Difference between revisions of "Synchronization and backup programs"

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[[Category:Data compression and archiving]]
 
[[Category:Data compression and archiving]]
 
[[Category:System recovery]]
 
[[Category:System recovery]]
[[ru:Backup Programs]]
+
[[de:Backups]]
This wiki page contains information about various backup programs. It's a good idea to ''have'' regular backups of important data, most notably configuration files ({{Ic|/etc/*}}) and the local pacman database (usually {{Ic|/var/lib/pacman/local/*}}).
+
[[ja:バックアッププログラム]]
 +
[[ru:Backup programs]]
 +
{{Related articles start}}
 +
{{Related|Full system backup with rsync}}
 +
{{Related|Full System Backup with tar}}
 +
{{Related|Disk cloning}}
 +
{{Related|List of applications#File sharing}}
 +
{{Related|System maintenance#Backup}}
 +
{{Related|Dotfiles#Version control}}
 +
{{Related|Snapper}}
 +
{{Related|File recovery}}
 +
{{Related articles end}}
  
== Introduction ==
+
This page lists and compares applications that synchronize data between two or more locations, and those that build on top of such functionality to make incremental copies of important data for backup purposes. Because of their relationship, the two groups share several traits that justify describing them in the same article.
Before you start trying various programs out, try to think about your needs, e.g. consider the following questions:
+
* What backup medium do I have available? (CD, DVD, remote server, external hard drive, etc.)
+
* How often do I plan to backup? (daily, weekly, monthly, etc.)
+
* What features do I expect from the backup solution? (compression, encryption, handles renames, etc.)
+
* How do I plan to restore backups if needed?
+
  
== Incremental backups ==
+
== Backup overview ==
Applications that can do incremental backups remember and take into account what data has been backed up during the last run and eliminate the need to have duplicates of unchanged data. Restoring the data to a certain point in time would require locating the last full backup and all the incremental backups from then to the moment when it is supposed to be restored. This sort of backup is useful for those who do it very often.
+
  
=== Rsync-type backups ===
+
Having backups of important data is a necessary measure to take, since human and machine processing errors are very likely to generate corruption as time passes, and also the physical media where the data is stored is inevitably destined to fail. In order to choose the best program for one's own needs, the following aspects should be considered:
The main characteristic of this type of backups is that they maintain a copy of the directory you want to keep a backup of, in a traditional "mirror" fashion.
+
  
Certain rsync-type packages also do snapshot backups by storing files which describe how the contents of files and folders changed from the last backup (so-called 'diffs'). Hence, they are inherently incremental, but usually they do not have compression or encryption. On the other hand, a working copy of everything is immediately available, no decompression/decryption needed. A downside to rsync-type programs is that they cannot be easily burned and restored from a CD or DVD.
+
* The type of backup medium that is going to store the data, e.g. CD, DVD, remote server, external hard drive, etc.
 +
* The planned frequency of backups, e.g. daily, weekly, monthly, etc.
 +
* The features expected from the backup solution, e.g. compression, encryption, handles renames, etc.
 +
* The planned method to restore backups if needed.
  
==== Console ====
+
== Data synchronization ==
* {{App|[[rsync]]|A file transfer program to keep remote files in sync.
+
** rsync almost always makes a mirror of the source.
+
** It is possible to restore a full backup before the most recent backup if hardlinks are allowed in the backup file system. See the section "Back up your data with rsync" in this link |http://www.ibm.com/developerworks/aix/library/au-spunix_rsync/index.html|
+
  
** If hard links are not allowed, it is impossible to restore a full backup before the most recent backup (but you can use --backup to keep old versions of the files).
+
These applications simply keep directories synchronized between multiple locations/machines, in a "mirror" fashion. Nonetheless, most of them still allow storing and reverting to old revisions of modified or deleted files.
** Standard install on all distros.
+
** Can run over SSH (port 22) or native rsync protocol (port 873).
+
** Win32 version available.
+
|http://rsync.samba.org/|{{Pkg|rsync}}}}
+
  
* {{App|[[Wikipedia:Rsync#Variations|rdiff-backup]]|A utility for local/remote mirroring and incremental backups.
+
See also [[Wikipedia:Comparison of file synchronization software]].
** Stores the most recent backup as regular files.
+
** To revert to older versions, you apply the diff files to recreate the older versions.
+
** It is granularly incremental (delta backup), it only stores changes to a file; will not create a new copy of a file upon change.
+
** Win32 version available.
+
|http://www.nongnu.org/rdiff-backup/|{{Pkg|rdiff-backup}}}}
+
  
* {{App|[[rsnapshot]]|A remote filesystem snapshot utility.
+
'''Legend:'''
** Does not store diffs, instead it copies entire files if they have changed.
+
** Creates hard links between a series of backed-up trees (snapshots).
+
** It is differential in that the size of the backup is only the original backup size plus the size of all files that have changed since the last backup.
+
** Destination filesystem must support hard links.
+
** Win32 version available.
+
|http://www.rsnapshot.org/|{{Pkg|rsnapshot}}}}
+
  
* {{App|SafeKeep|A client/server backup system which uses rdiff-backup.
+
* '''Name''': the application name, linking to the official website.
** Integrates with Linux LVM and databases to create consistent backups.
+
* '''Installation''': a link to the main ArchWiki article, if existing, or directly to the package pages.
** Bandwidth throttling.
+
* '''Implementation''': the programming language, library, or utility that the application is based on.
|http://safekeep.sourceforge.net/|{{AUR|safekeep}}}}
+
* '''Delta transfer''': only the modified ''parts'' of files are transferred.
 +
* '''Encrypted transfer''': data is encrypted by default when transferred over the network.
 +
* '''FS metadata''': file system permissions and attributes are synchronized.
 +
* '''Resumable''': the synchronization can be resumed without restarting it if interrupted.
 +
* '''Handles renames''': moved/renamed files are detected and not stored or transferred twice; it typically means that a checksum is computed for files or chunks thereof.
 +
* '''Version control''': the old version of files are backed up ('''reverse incremental backup''').
 +
* '''Conflict resolution''': the application handles file conflicts, either automatically or interactively, i.e. it does not silently discard conflicting files.
 +
* '''Multidirectional''': ''more'' than 2 locations can be kept in sync together.
 +
* '''FS monitoring''': the application listens to file system events to trigger the synchronization.
 +
* '''CLI''': the application is command-line driven, i.e. it is scriptable.
 +
* '''Other interfaces''': the application has the specified user interfaces, e.g. GUI, TUI, or web-based.
 +
* '''Licence''': the licence of the server and client applications.
 +
* '''Other platforms''': supported operating systems other than Linux.
 +
* '''Active''': whether the project is currently maintained.
 +
* '''Specificity''': brief notes about special features that notably set the application apart from the others.
  
* {{App|Link-Backup|A tool similar to rsync based scripts, but which does not use rsync.
+
{{Expansion|Enter values in the cells marked with "?". Also replace the "Yes" with more specific values and references.}}
** Creates hard links between a series of backed-up trees (snapshots).
+
** Intelligently handles renames, moves, and duplicate files without additional storage or transfer.
+
** The backup directory contains {{ic|.catalog}}, a catalog of all unique file instances; backup trees hard-link to this catalog.
+
** Transfer occurs over standard I/O locally or remotely between a client and server instance of this script.
+
** It copies itself to the server; it does not need to be installed on the server.
+
** Requires SSH for remote backups.
+
** It resumes stopped backups; it can even be told to run for an arbitrary number of minutes.
+
|http://www.scottlu.com/Content/Link-Backup.html|{{AUR|link-backup}}}}
+
  
* {{App|[[Wikipedia:Unison (file synchronizer)|Unison]]|A program that synchronizes files between two machines over network (LAN or Inet) using a smart diff method + rsync. Allows the user to interactively choose which changes to push, pull, or merge.|http://www.cis.upenn.edu/~bcpierce/unison/|{{Pkg|unison}}}}
+
{| class="wikitable sortable"
 +
! Name
 +
! Installation
 +
! Implementation
 +
! Delta transfer
 +
! Encrypted transfer
 +
! FS metadata
 +
! Resumable
 +
! Handles renames
 +
! Version control
 +
! Conflict resolution
 +
! Multidirectional
 +
! FS monitoring
 +
! CLI
 +
! Other interfaces
 +
! Licence
 +
! Other platforms
 +
! Active
 +
! Specificity
 +
|-
 +
| [https://www.getsync.com/ BitTorrent Sync]
 +
| [[BitTorrent Sync]]
 +
| Closed source
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{G|Web}}
 +
| Proprietary freemium
 +
| OS X, Windows, Android, iOS, Windows Phone, Amazon Kindle Fire, FreeBSD
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://freefilesync.sourceforge.net/ FreeFileSync]
 +
| {{AUR|freefilesync}}
 +
| C++
 +
| style="text-align:center;" | ?
 +
| {{G|SFTP [http://www.freefilesync.org/faq.php#features]}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{G|Yes [http://www.freefilesync.org/faq.php#features]}}
 +
| {{G|1=Yes [http://www.freefilesync.org/manual.php?topic=versioning]}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{Yes}}
 +
| GPL
 +
| Windows, OS X
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://git-annex.branchable.com/ git-annex]
 +
| {{Pkg|git-annex}}
 +
| Haskell, git
 +
| {{G|rsync [http://git-annex.branchable.com/transferring_data/]}}
 +
| {{G|rsync [http://git-annex.branchable.com/transferring_data/]}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{G|git remotes [http://git-annex.branchable.com/sync/]}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| {{G|[http://git-annex.branchable.com/assistant/ git-annex assistant]}}
 +
| GPLv3
 +
| OS X, Android
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://www.opbyte.it/grsync/ Grsync]
 +
| {{Pkg|grsync}}
 +
| rsync front-end
 +
| {{G|rsync}}
 +
| {{G|rsync}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{G|GTK+}}
 +
| GPLv2
 +
|
 +
| style="text-align:center;" | ?
 +
|
 +
|-
 +
| [https://github.com/gutenye/gutbackup gutbackup]
 +
| {{AUR|gutbackup}}
 +
| rsync wrapper
 +
| {{G|rsync}}
 +
| {{G|rsync}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| {{No}}
 +
| MIT
 +
|
 +
| style="text-align:center;" | ?
 +
|
 +
|-
 +
| [http://jotasync.trixon.se/ Jotasync]
 +
| {{AUR?|jotasync}}
 +
| Java gui for rsync
 +
| {{G|rsync}}
 +
| {{G|rsync}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| {{Y|limited}}
 +
| {{G|Swing}}
 +
| Apache v2
 +
| OS X, Windows
 +
| {{Yes}}
 +
| Integrated scheduler.
 +
|-
 +
| [http://luckybackup.sourceforge.net/index.html luckyBackup]
 +
| {{AUR|luckybackup}}
 +
| C++
 +
| {{G|rsync [http://luckybackup.sourceforge.net/features.html]}}
 +
| {{G|rsync [http://luckybackup.sourceforge.net/features.html]}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| {{Y|limited [http://luckybackup.sourceforge.net/manual.html#terminal]}}
 +
| {{G|Qt}}
 +
| GPLv3
 +
|
 +
| {{Y|frozen [http://luckybackup.sourceforge.net/index.html]}}
 +
|
 +
|-
 +
| [http://www.netpower.fr/osync osync.sh]
 +
| {{AUR?|osync}}
 +
| Shell
 +
| {{G|rsync}}
 +
| {{G|rsync}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{G|optional [https://github.com/deajan/osync#daemon-mode]}}
 +
| {{Yes}}
 +
| {{No}}
 +
| BSD
 +
|
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://www.nongnu.org/rdiff-backup/ rdiff-backup]
 +
| {{Pkg|rdiff-backup}}
 +
| Python 2
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Y|preview changes}}
 +
| {{No}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{No}}
 +
| GPL
 +
| Win32
 +
| style="text-align:center;" | ?
 +
|
 +
|-
 +
| [http://rsync.samba.org/ rsync]
 +
| [[rsync]]
 +
| C
 +
| {{Yes}}
 +
| {{G|SSH or native protocol}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{No}}
 +
| {{G|
 +
* {{ic|--link-dest}} with hard links [http://www.ibm.com/developerworks/aix/library/au-spunix_rsync/index.html#backup]
 +
* {{ic|--backup}}
 +
}}
 +
| {{Y|preview changes}}
 +
| {{No}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{G|grsync}}
 +
| GPLv3
 +
| Win32
 +
| {{Yes}}
 +
| Standard install on all Linux distributions.
 +
|-
 +
| [http://sparkleshare.org/ SparkleShare]
 +
| {{Pkg|sparkleshare}}
 +
| C#
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{Yes}}
 +
| GPLv3
 +
| Windows, OS X
 +
| style="text-align:center;" | ?
 +
|
 +
|-
 +
| [https://syncthing.net/ Syncthing]
 +
| [[Syncthing]]
 +
| Go
 +
| {{G|Yes [http://docs.syncthing.net/users/faq.html#is-synchronization-fast]}}
 +
| {{G|Yes [http://docs.syncthing.net/users/security.html]}}
 +
| {{Y|partial [http://docs.syncthing.net/users/faq.html#what-things-are-synced]}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{G|Yes [http://docs.syncthing.net/users/versioning.html]}}
 +
| {{G|renames one file [https://docs.syncthing.net/users/faq.html#what-if-there-is-a-conflict]}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{G|Web, GTK}}
 +
| MPL v2
 +
| Windows, OS X, Android, BSD, Solaris
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://synkron.sourceforge.net/ Synkron]
 +
| {{AUR|synkron}}
 +
| C++
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{G|Qt}}
 +
| GPLv2
 +
| Windows, OS X
 +
| style="text-align:center;" | ?
 +
|
 +
|-
 +
| [https://tasktools.org/projects/taskd.html taskd]
 +
| [[Taskd]]
 +
| C++, python,
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{No}}
 +
| MIT
 +
| Android
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://www.cis.upenn.edu/~bcpierce/unison/ Unison]
 +
| [[Unison]]
 +
| OCaml
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Y|partial [http://www.cis.upenn.edu/~bcpierce/unison/download/releases/stable/unison-manual.html#perms]}}
 +
| {{G|optional [http://www.cis.upenn.edu/~bcpierce/unison/download/releases/stable/unison-manual.html#speeding]}}
 +
| {{No}}
 +
| {{G|Yes [http://www.cis.upenn.edu/~bcpierce/unison/download/releases/stable/unison-manual.html#backups]}}
 +
| {{G|interactive}}
 +
| {{No}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{G|GTK2}}
 +
| GPL
 +
| Windows, OS X, FreeBSD, Android
 +
| {{G|Yes [http://www.cis.upenn.edu/~bcpierce/unison/status.html]}}
 +
|
 +
|-
 +
! Name
 +
! Installation
 +
! Implementation
 +
! Delta transfer
 +
! Encrypted transfer
 +
! FS metadata
 +
! Resumable
 +
! Handles renames
 +
! Version control
 +
! Conflict resolution
 +
! Multidirectional
 +
! FS monitoring
 +
! CLI
 +
! Other interfaces
 +
! Licence
 +
! Other platforms
 +
! Active
 +
! Specificity
 +
|}
  
* {{App|oldtime|A highly customizable and configurable backup & restore system.|https://github.com/GutenYe/oldtime|{{AUR?|oldtime}}}}
+
== Incremental backups ==
  
==== Graphical ====
+
Applications that can do incremental backups remember and take into account what data has been backed up during the last run (so-called "diffs") and eliminate the need to have duplicates of unchanged data. Restoring the data to a certain point in time would require locating the last full backup and all the incremental backups from then to the moment when it is supposed to be restored. This sort of backup is useful for those who do it very often.
* {{App|Back In Time|A simple backup tool for Linux inspired by the [[Wikipedia:FlyBack|FlyBack]] and [https://wiki.ubuntu.com/TimeVault/ TimeVault] projects.
+
** Creates hard links between a series of backed-up trees (snapshots).
+
** Really is just a front-end to {{ic|rsync}}, {{ic|diff}}, {{ic|cp}}.
+
** A new snapshot is created only if something changed since the last snapshot.
+
|http://backintime.le-web.org/|{{AUR|backintime}}}}
+
  
* {{App|[[Wikipedia:FlyBack|FlyBack]]|A clone of Apple's [[Wikipedia:Time Machine (Mac OS)|Time Machine]], a backup utility for Mac OS X.|http://www.flyback-project.org/|{{AUR|flyback}}}}
+
See also [[Dotfiles#Version control]].
  
* {{App|[[Wikipedia:Areca Backup|Areca Backup]]|An easy to use and reliable backup solution for Linux and Windows.
+
'''Legend:'''
** Written in Java.
+
** Primarily archive-based (zip), but will do file-based backup as well.
+
** Delta backup supported (stores only changes).
+
|http://areca.sourceforge.net/|{{AUR|areca}}}}
+
  
* {{App|[[Wikipedia:LuckyBackup|luckyBackup]]|An easy program to backup and sync your files.
+
* '''Name''': the application name, linking to the official website.
** It is written in Qt and C++.
+
* '''Installation''': a link to the main ArchWiki article, if existing, or directly to the package pages.
** It has sync, backup (with include and exclude options) and restore capabilities.
+
* '''Implementation''': the programming language, library, or utility that the application is based on.
** It can do remote connection backups, scheduled backups.
+
* '''Compressed storage''': compression is used for storage.
** A command line mode.
+
* '''Encrypted storage''': encryption is used for storage.
|http://luckybackup.sourceforge.net/index.html|{{AUR|luckybackup}}}}
+
* '''Delta transfer''': only the modified ''parts'' of files are transferred.
 +
* '''Encrypted transfer''': data is encrypted by default when transferred over a network.
 +
* '''FS metadata''': file system permissions and attributes are backed up.
 +
* '''Easy access''': the backup is stored plainly in the file system, or is mountable as such.
 +
* '''Resumable''': the backup can be resumed without restarting it if interrupted.
 +
* '''Handles renames''': moved/renamed files are detected and not stored or transferred twice; it typically means that a checksum is computed for files or chunks thereof.
 +
* '''CLI''': the application is command-line driven, i.e. it is scriptable.
 +
* '''Other interfaces''': the application has the specified user interfaces, e.g. GUI, TUI, or web-based.
 +
* '''Licence''': the licence of the server and client applications.
 +
* '''Other platforms''': supported operating systems other than Linux.
 +
* '''Active''': whether the project is currently maintained.
 +
* '''Specificity''': brief notes about special features that notably set the application apart from the others.
  
* {{App|syncBackup|A front-end for rsync that provides a fast and extraordinary copying tool. It offers the most common options that control its behavior and permit very flexible specification of the set of files to be copied.
+
=== Single machine ===
|http://www.darhon.com/syncbackup|{{AUR|syncbackup}}}}
+
  
* {{App|[[BackupPC]]|A high-performance, enterprise-grade system for backing up Unix, Linux, Windows, and Mac OS X desktops and laptops to a remote server.
+
These applications are aimed at backing up data from the machine they are installed on, although the backup destination can be located on an external machine or storage media.
** Deduplication: Identical files across multiple backups of the same or different PCs are stored only once resulting in substantial savings in disk storage and disk I/O.
+
** Optional compression support further reducing disk storage.
+
** No client-side software is needed.
+
** Simple but powerful web-based UI.
+
|http://backuppc.sourceforge.net/index.html|{{Pkg|backuppc}}}}
+
  
=== Other backups ===
+
==== Chunk-based increments ====
Most other backup applications tend to create (big) archive files and (of course) keep track of what's been archived. Creating {{ic|.tar.bz2}} or {{ic|.tar.gz}} archives has the advantage that you can extract the backups with just tar/bzip2/gzip, so you do not need to have the backup program around.
+
  
==== Console ====
+
If a file is modified, these applications store only its changed ''parts'' at the next snapshot. Compared to [[#File-based increments]] applications, these are more space-efficient, especially when large files receive small modifications; on the other hand, the archived snapshots have to be opened with the backup application that created them, since the files have to be reconstructed from the stored binary diffs.
* {{App|Arch Backup|A trivial backup script with simple configuration.
+
** Configurable compression method.
+
** Multiple backup targets.
+
|http://code.google.com/p/archlinux-stuff/|{{Pkg|arch-backup}}}}
+
  
* {{App|[[Backup with hdup|hdup]]|A very simple command line backup tool.
+
{{Expansion|Enter values in the cells marked with "?". Also replace the "Yes" with more specific values and references.}}
** Creates tar.gz or tar.bz2 archives.
+
** Supports gpg encryption.
+
** Supports pushing over SSH.
+
** Multiple backup targets.
+
|http://miek.nl/projects/hdup2/|{{AUR|hdup}}}}
+
  
* {{App|rdup|A platform for backups that provides scripts to facilitate backups and delegates the encryption, compression, transfer and packaging to other utilities in a true Unix-way.
+
{| class="wikitable sortable"
** Creates tar.gz archives or rsync-type copy.
+
! Name
** Encryption (gpg, blowfish and others); also applies for rsync-type copy.
+
! Installation
** Compression (also for rsync-type copy).
+
! Implementation
|http://miek.nl/projects/rdup|{{AUR|rdup}}}}
+
! Compressed storage
 +
! Encrypted storage
 +
! Delta transfer
 +
! Encrypted transfer
 +
! FS metadata
 +
! Easy access
 +
! Resumable
 +
! Handles renames
 +
! CLI
 +
! Other interfaces
 +
! Licence
 +
! Other platforms
 +
! Active
 +
! Specificity
 +
|-
 +
| [http://areca.sourceforge.net/ Areca Backup]
 +
| {{AUR|areca}}
 +
| Java
 +
| {{G|Zip, Zip64}}
 +
| {{G|AES128, AES256}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Y|Pausing only}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| GPLv2
 +
| Windows
 +
| {{Yes}}
 +
|
 +
|-
 +
| [https://github.com/jborg/attic/ Attic]
 +
| {{AUR|attic}}
 +
| Python
 +
| {{Yes}}
 +
| {{G|AES256}}
 +
| {{Yes}}
 +
| {{G|SSH}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{No}}
 +
| BSD
 +
|
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://borgbackup.readthedocs.org/en/stable/ BorgBackup]
 +
| {{Pkg|borg}}
 +
| Python (Attic fork)
 +
| {{G|lz4, zlib, lzma}}
 +
| {{G|AES256}}
 +
| {{Yes}}
 +
| {{G|SSH}}
 +
| {{Yes}}[http://borgbackup.readthedocs.org/en/stable/faq.html#which-file-types-attributes-etc-are-preserved]
 +
| {{Yes}}[http://borgbackup.readthedocs.org/en/stable/usage.html#borg-mount]
 +
| {{Yes}}[http://borgbackup.readthedocs.org/en/stable/faq.html#if-a-backup-stops-mid-way-does-the-already-backed-up-data-stay-there]
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{G|third party}}
 +
| BSD
 +
| *BSD, OS X
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://viric.name/cgi-bin/btar btar]
 +
| {{AUR|btar}}{{Broken package link|{{aur-mirror|btar}}}}
 +
| C
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| {{No}}
 +
| GPLv3
 +
|
 +
| {{Yes}}
 +
| Redundancy, indexed extraction, multicore compression, input and output serialisation, tolerance to partial archive errors.
 +
|-
 +
| [https://bup.github.io/ bup]
 +
| {{Pkg|bup}} {{AUR|bup-git}}
 +
| C, Python, git
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{G|Immature}}
 +
| {{Yes}}[https://bup.github.io/man/bup-fuse.html]
 +
| {{G|pick up where you left off [https://github.com/bup/bup/blob/master/README.md#reasons-bup-is-awesome]}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{G|third party}}
 +
| GPLv2
 +
| Windows, OS X, NetBSD, Solaris
 +
| {{Yes}}
 +
| Same storage format as git
 +
|-
 +
| [https://github.com/emersion/bups bups]
 +
| {{AUR|bups}}
 +
| bup frontend
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{G|Immature}}
 +
| {{Yes}}
 +
| {{G|pick up where you left off [https://github.com/bup/bup/blob/master/README.md#reasons-bup-is-awesome]}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{G|GTK 3}}
 +
| MIT
 +
|
 +
| {{Yes}}
 +
|
 +
|-
 +
| [https://launchpad.net/deja-dup Déjà Dup]
 +
| [[Déjà Dup]]
 +
| duplicity front-end
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{G|GTK+}}
 +
| GPLv3
 +
|
 +
| {{Yes}}
 +
| Integrated into [[GNOME Files]].
 +
|-
 +
| [http://www.duplicati.com/ Duplicati]
 +
| {{AUR|duplicati-latest}}
 +
| C#
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{R|scheduled for 2.0 release}}
 +
| {{No}}
 +
| {{Y|Pausing only}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| LGPL
 +
| Windows
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://www.nongnu.org/duplicity/ Duplicity]
 +
| [[Duplicity]]
 +
| librsync
 +
| {{G|gzip}}
 +
| {{G|gpg}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{G|Déjà Dup}}
 +
| GPL
 +
|
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://www.duply.net/ Duply]
 +
| [[Duply]]
 +
| duplicity front-end
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{No}}
 +
| GPLv2
 +
|
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://kde-apps.org/content/show.php/Kup+Backup+System?content=147465 Kup Backup System]
 +
| {{Pkg|kup}}
 +
| rsync, bup front-end
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{G|Immature}}
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Y|bup}}
 +
| {{G|Qt}}
 +
| GPLv2
 +
|
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://liw.fi/obnam/ obnam]
 +
| {{AUR|obnam}}
 +
| Python
 +
| {{Yes}}
 +
| {{G|GnuPG}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| {{G|checkpoints every 100MB}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| {{No}}
 +
| GPLv3
 +
|
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://zbackup.org/ ZBackup]
 +
| {{AUR|zbackup}}
 +
| C++
 +
| {{G|LZMA, LZO}}
 +
| {{G|AES}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{R|planned [https://github.com/zbackup/zbackup#improvements]}}
 +
| {{No}}
 +
| {{Y|Kinda through tar}}
 +
| {{Yes}}
 +
| {{No}}
 +
| GPLv2
 +
|
 +
| {{Yes}}
 +
| Repository consists of immutable files.
 +
|-
 +
! Name
 +
! Installation
 +
! Implementation
 +
! Compressed storage
 +
! Encrypted storage
 +
! Delta transfer
 +
! Encrypted transfer
 +
! FS metadata
 +
! Easy access
 +
! Resumable
 +
! Handles renames
 +
! CLI
 +
! Other interfaces
 +
! Licence
 +
! Other platforms
 +
! Active
 +
! Specificity
 +
|}
  
* {{App|[[Duplicity]]|A simple command-line utility which allows encrypted compressed incremental backup to nearly any storage.
+
==== File-based increments ====
** Supports gpg encryption and signing.
+
** Supports gzip compression.
+
** Supports full or incremental backups, incremental backup stores only difference between new and old file.
+
** Supports pushing over FTP, SSH, rsync, WebDAV, WebDAVs, HSi and Amazon S3 or local filesystem.
+
|http://www.nongnu.org/duplicity/|{{Pkg|duplicity}}}}
+
  
* {{App|[[Wikipedia:DAR (Disk Archiver)|DAR]]|A full-featured command-line backup tool, short for Disk ARchive.
+
If a file is modified, these applications store its new version entirely at the next snapshot. Compared to [[#Chunk-based increments]] applications, these are less space-efficient, especially when large files receive small modifications; on the other hand, often the archived snapshots can be opened without the need to have the backup application installed.
** It uses its own format for archives (so you need to have it around when you want to restore).
+
** Supports splitting backups into more files by size.
+
** Makefile-type config files, some custom scripts are available along with it.
+
** Supports basic encryption.
+
** Automatic backup using [[cron]] is possible with {{AUR|sarab}}.
+
|http://dar.linux.free.fr/|{{AUR|dar}} {{AUR|kdar}} (fontend)}}
+
  
* {{App|Manent|An algorithmically strong backup and archival program. NOTE: no upstream activity since 2009.
+
'''Specific legend:'''
** Efficient backup to anything that looks like a storage.
+
** Works well over a slow and unreliable network.
+
** Offers online access to the contents of the backup.
+
** Backed up storage is completely encrypted.
+
** Several computers can use the same storage for backup, automatically sharing data.
+
** Not reliant on timestamps of the remote system to detect changes.
+
** Cross-platform support for Unicode file names.
+
|http://code.google.com/p/manent/|{{AUR|manent}}}}
+
  
* {{App|btar|tar-compatible archiver
+
* '''Hard links''': whether unmodified files are stored as hard links to previous versions.
** Fast archive creation (multicore compression or ciphering)
+
** Arbitrary chain of compression/ciphers (calls any compression/ciphering programs)
+
** Indexed archive retrieval or listing
+
** Redundancy
+
** Serialization through pipes (and only one file per backup)
+
** Can be extracted or checked with gnutar
+
** Differential backups of multiple levels
+
** Optional encoding of big files with rsync-differences
+
|http://viric.name/cgi-bin/btar|{{AUR|btar}}}}
+
  
* {{App|obnam|Easy, secure backup program
+
{{Expansion|Enter values in the cells marked with "?". Also replace the "Yes" with more specific values and references.}}
** Uses snapshots instead of full/incremental backups
+
|http://liw.fi/obnam/|{{AUR|obnam}}}}
+
  
* {{App|System Tar & Restore|A set of bash scripts for full system backup and restore
+
{| class="wikitable sortable"
** CLI and Dialog interfaces, Zenity wrappers
+
! Name
** Easy backup and restore wizards
+
! Installation
** Uses tar to create and restore backups
+
! Implementation
** Creates tar.gz or tar.xz archives
+
! Compressed storage
** Uses rsync to transfer a running system
+
! Encrypted storage
** Supports Grub2 and Syslinux
+
! Delta transfer
|http://code.google.com/p/system-tar-and-restore/|{{AUR|system-tar-and-restore}}}}
+
! Encrypted transfer
 +
! FS metadata
 +
! Easy access
 +
! Resumable
 +
! Handles renames
 +
! Hard links
 +
! CLI
 +
! Other interfaces
 +
! Licence
 +
! Other platforms
 +
! Active
 +
! Specificity
 +
|-
 +
| [https://github.com/bit-team/backintime Back In Time]
 +
| [[Back In Time]]
 +
| Python, rsync, diff
 +
| {{No}}
 +
| {{No}}
 +
| {{G|rsync}}
 +
| {{G|rsync}}
 +
| {{G|rsync}}
 +
| {{Yes}}
 +
| {{No}}
 +
| {{No}}
 +
| {{G|Yes [http://backintime.le-web.org/documentation/]}}
 +
| {{Yes}}
 +
| {{G|Qt}}
 +
| GPLv2
 +
|
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://dar.linux.free.fr/ DAR] (Disk ARchive)
 +
| {{AUR|dar}}
 +
| C++
 +
| {{G|special archive format}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{R|No [http://dar.linux.free.fr/doc/Features.html]}}
 +
| {{Yes}}
 +
| {{G|DarGUI}}
 +
| GPL
 +
| Windows, Solaris, FreeBSD, NetBSD, MacOS X
 +
| {{Yes}}
 +
| Automatic backup using [[cron]] is possible with {{AUR|sarab}}{{Broken package link|{{aur-mirror|sarab}}}}.
 +
|-
 +
| [http://dargui.sourceforge.net/ DarGUI]
 +
| {{AUR|dargui}}
 +
| DAR front-end
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{R|No [http://dar.linux.free.fr/doc/Features.html]}}
 +
| {{No}}
 +
| {{G|GTK}}
 +
| GPL
 +
| Windows
 +
| style="text-align:center;" | ?
 +
|
 +
|-
 +
| [http://miek.nl/projects/hdup2/ hdup]{{Dead link|2016|07|11}}
 +
| {{Aur|hdup}}
 +
| C
 +
| {{G|bzip, gzip, lzop}}
 +
| {{G|gpg}}
 +
| style="text-align:center;" | ?
 +
| {{G|SSH}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{No}}
 +
| {{No}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{No}}
 +
| GPLv2
 +
|
 +
| {{No}}
 +
| Multiple backup targets.
 +
|-
 +
| [http://www.scottlu.com/Content/Link-Backup.html Link-Backup]
 +
| {{AUR|link-backup}}
 +
| Python
 +
| {{No}}
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| {{G|SSH}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{R|No [http://www.scottlu.com/Content/Link-Backup.html]}}
 +
| {{Yes}}
 +
| {{No}}
 +
| MIT
 +
|
 +
| {{No}}
 +
| It copies itself to the server.
 +
|-
 +
| [https://github.com/miekg/rdup rdup]
 +
| {{AUR|rdup}}
 +
| C
 +
| {{G|tar.gz}}
 +
| {{G|gpg, blowfish and others}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{No}}
 +
| GPLv3
 +
|
 +
| {{No}}
 +
| Set of command-line tools.
 +
|-
 +
| [http://www.rsnapshot.org/ rsnapshot]
 +
| [[rsnapshot]]
 +
| rsync
 +
| {{No}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{G|Yes [http://rsnapshot.org/rsnapshot/docs/docbook/rest.html]}}
 +
| {{Yes}}
 +
| {{No}}
 +
| GPLv2
 +
| Win32
 +
| {{Yes}}
 +
|
 +
|-
 +
| [https://launchpad.net/sbackup sbackup]
 +
| {{AUR|sbackup}}
 +
| Python
 +
| {{G|gzip, bzip2}}
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| {{G|SSH}}
 +
| style="text-align:center;" | ?
 +
| {{No}}
 +
| {{No}}
 +
| {{No}}
 +
| {{No}}
 +
| {{No}}
 +
| {{G|GTK}}
 +
| GPLv3
 +
|
 +
| {{Yes}}
 +
|
 +
|-
 +
| [https://launchpad.net/timeshift TimeShift]
 +
| {{AUR|timeshift}}
 +
| rsync
 +
| {{No}}
 +
| {{No}}
 +
| {{G|rsync}}
 +
| {{G|rsync}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| {{No}}
 +
| {{G|GTK}}
 +
| GPLv3
 +
| Designed for full-system backups to dedicated devices.
 +
| {{Yes}}
 +
|
 +
|-
 +
! Name
 +
! Installation
 +
! Implementation
 +
! Compressed storage
 +
! Encrypted storage
 +
! Delta transfer
 +
! Encrypted transfer
 +
! FS metadata
 +
! Easy access
 +
! Resumable
 +
! Handles renames
 +
! Hard links
 +
! CLI
 +
! Other interfaces
 +
! Licence
 +
! Other platforms
 +
! Active
 +
! Specificity
 +
|}
  
==== Graphical ====
+
=== Network oriented ===
* {{App|Backerupper|A simple program for backing up selected directories over a local network. Its main intended purpose is backing up a user's personal data.
+
** Creates {{ic|.tar.gz}} archives.
+
** Configurable backup frequency, backup time and max copies.
+
|http://sourceforge.net/projects/backerupper/|{{AUR|backerupper}}}}
+
  
* {{App|[[Duplicity|Déjà Dup]]|A simple GTK+ backup program. It hides the complexity of doing backups the 'right way' (encrypted, off-site, and regular) and uses duplicity as the backend.
+
These applications have been designed to centralize the backup of several machines connected to a network, through a server-client model. In general they are more complicated to deploy, compared to [[#Single machine]] solutions.
** Automatic, timed backup configurable in GUI.
+
** Restore wizard.
+
** Integrated into the Nautilus file manager.
+
** Inherits several features of duplicity.
+
|https://launchpad.net/deja-dup|{{Pkg|deja-dup|}}}}
+
  
* {{App|Synkron|A folder synchronization tool.
+
'''Specific legend:'''
** Syncs multiple folders.
+
 
** Can exclude files from sync based on wildcards.
+
* '''Increment type''': the strategy used to reduce used space by deduplicating data (i.e., besides compression).
** Restores files.
+
** '''file-based''': if a file is modified, the entire new version is stored at each snapshot.
** Cross-platform support.
+
*** '''hard-links''': whether unmodified files are stored as hard links to previous versions.
|http://synkron.sourceforge.net/|{{AUR|synkron}}}}
+
** '''chunk-based''': only the modified ''parts'' of files are stored at each snapshot.
 +
 
 +
{{Expansion|Enter values in the cells marked with "?". Also replace the "Yes" with more specific values and references.}}
 +
 
 +
{| class="wikitable sortable"
 +
! Name
 +
! Installation
 +
! Implementation
 +
! Compressed storage
 +
! Encrypted storage
 +
! Delta transfer
 +
! Encrypted transfer
 +
! FS metadata
 +
! Easy access
 +
! Resumable
 +
! Handles renames
 +
! Increment type
 +
! CLI
 +
! Other interfaces
 +
! Licence
 +
! Other platforms
 +
! Active
 +
! Specificity
 +
|-
 +
| [http://backuppc.sourceforge.net/index.html BackupPC]
 +
| [[BackupPC]]
 +
| Perl
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| file-based, hard links [http://backuppc.sourceforge.net/faq/BackupPC.html#Backup-basics]
 +
| {{No}}
 +
| {{G|Web}}
 +
| GPLv2
 +
| Any (no client needed)
 +
| {{Yes}}
 +
| Identical files across backups of the same or different clients are stored only once.
 +
|-
 +
| [http://www.bacula.org Bacula]
 +
| [https://aur.archlinux.org/packages/?K=bacula- bacula-*] in [[AUR]]
 +
| C++
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| file-based [http://burp.grke.org/why.html]
 +
| {{Yes}}
 +
| {{G|GUI, Web}}
 +
| AGPLv3
 +
| Windows, OS X
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://burp.grke.org burp]
 +
| {{AUR|burp-backup}}
 +
| librsync
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| chunk-based [http://burp.grke.org/why.html]
 +
| {{Yes}}
 +
| {{G|[https://git.ziirish.me/ziirish/burp-ui burp-ui]}}
 +
| AGPLv3
 +
| Windows
 +
| {{Yes}}
 +
|
 +
|-
 +
| [http://safekeep.sourceforge.net/ SafeKeep]
 +
| {{AUR|safekeep}}
 +
| rdiff-backup
 +
| {{No}}
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| chunk-based [http://safekeep.sourceforge.net/safekeep.html]
 +
| {{Yes}}
 +
| {{No}}
 +
| GPL
 +
|
 +
| {{No}}
 +
| Integrates with [[LVM]] and databases to create consistent backups. Bandwidth throttling.
 +
|-
 +
| [http://www.snebu.com Snebu]
 +
| {{AUR|snebu}}{{Broken package link|{{aur-mirror|snebu}}}}
 +
| C
 +
| {{Yes}}
 +
| {{No}}
 +
| style="text-align:center;" | ?
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| ?
 +
| {{Yes}}
 +
| {{No}}
 +
| GPLv3
 +
|
 +
| style="text-align:center;" | ?
 +
| Supports arbitrary retention schedules.
 +
|-
 +
| [http://www.initzero.it/portal/soluzioni/software-open-source/synbak-universal-backup-system_2623.html Synbak]
 +
| {{Pkg|synbak}}
 +
| Multitool wrapper
 +
| {{Yes}}
 +
| {{No}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| {{Yes}}
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| style="text-align:center;" | ?
 +
| ?
 +
| {{No}}
 +
| {{G|Web}}
 +
| GPLv3
 +
|
 +
| {{Yes}}
 +
| Unifies several backup methods.
 +
|-
 +
! Name
 +
! Installation
 +
! Implementation
 +
! Compressed storage
 +
! Encrypted storage
 +
! Delta transfer
 +
! Encrypted transfer
 +
! FS metadata
 +
! Easy access
 +
! Resumable
 +
! Handles renames
 +
! Increment type
 +
! CLI
 +
! Other interfaces
 +
! Licence
 +
! Other platforms
 +
! Active
 +
! Specificity
 +
|}
 +
 
 +
== Cloud storage ==
 +
 
 +
{{Merge|List of applications#File sharing|Remove the extra bullet points: the Wikipedia comparison table, and the respective webpages and Wikipedia articles do a better job at describing them.}}
 +
 
 +
=== Third-party services ===
 +
 
 +
See also [[Wikipedia:Comparison of online backup services]].
 +
 
 +
* {{App|Amazon S3|Amazon Simple Storage Service (Amazon S3), provides developers and IT teams with secure, durable, highly-scalable object storage. Amazon S3 is easy to use, with a simple web service interface to store and retrieve any amount of data from anywhere on the web. With Amazon S3, you pay only for the storage you actually use. There is no minimum fee and no setup cost.|http://aws.amazon.com/s3/|{{Pkg|s3cmd}}}}
 +
 
 +
* {{App|CloudBacko|Enterprise-grade cloud backup tool for Linux, Mac and Windows.
 +
** Closed source. Free, Lite and Pro versions available.
 +
** Written in Java.
 +
** Encrypted backup to multiple cloud destinations.
 +
** Supports multiple cloud destinations combined as one storage pool.
 +
** No installation required in Free version.
 +
** GUI frontend for Linux in Pro version.
 +
** Virtual machine backup available in Pro version.
 +
|http://www.cloudbacko.com/}}
  
== Cloud backups ==
+
* {{App|[[CrashPlan]]|An online/offsite backup solution.
* {{App|[[Wikipedia:CrashPlan|CrashPlan]]|An online/offsite backup solution.
+
 
** Unlimited online space for very reasonable pricing.
 
** Unlimited online space for very reasonable pricing.
 
** Automatic and incremental backups to multiple destinations.
 
** Automatic and incremental backups to multiple destinations.
 
** Intuitive GUI.
 
** Intuitive GUI.
 
** Offers encryption and de-duplication.
 
** Offers encryption and de-duplication.
** Software is generally free.
+
** Software is free for local use.
 +
** Restore prevents simultaneous backing up
 
|http://www.crashplan.com/|{{AUR|crashplan}}}}
 
|http://www.crashplan.com/|{{AUR|crashplan}}}}
  
Line 203: Line 1,115:
 
** Community written add-ons.   
 
** Community written add-ons.   
 
** Free accounts have 2GB storage.
 
** Free accounts have 2GB storage.
|http://www.getdropbox.com|{{AUR|dropbox}} {{AUR|nautilus-dropbox}}}}
+
|http://www.dropbox.com|{{AUR|dropbox}} {{AUR|nautilus-dropbox}}}}
 +
 
 +
* {{App|[[Wikipedia:Google Drive|Google Drive]]|A file storage and synchronization service provided by Google.
 +
** Provides cloud storage, file sharing and collaborative editing.
 +
** Multiple clients are available.
 +
|https://drive.google.com|{{AUR|google-drive-ocamlfuse}} (free), {{AUR|drive}} (free), {{AUR|grive}} (free), {{AUR|gdrivefs}} (free), [[insync]] (non-free)}}
 +
 
 +
* {{App|[[Wikipedia:IDrive_Inc.|iDrive]]|Universal Online Backup.
 +
** Multiple Device Backup.
 +
** Online File Sync. 
 +
** Real-Time Backup. 
 +
** Backup and Access from Mobile Devices. 
 +
** Remote Manage. 
 +
** No GUI Front end for Linux, command line based. A wrapper script is available to make it easier to use.
 +
|https://www.idrive.com/|{{AUR|idevsutil}}{{Broken package link|{{aur-mirror|idevsutil}}}}, {{AUR|idrive-wrapper}}{{Broken package link|{{aur-mirror|idrive-wrapper}}}}}}
  
 
* {{App|[[Wikipedia:Jungle Disk|Jungle Disk]]|An online backup tool that stores its data in Amazon S3 or Rackspace Cloud Files.
 
* {{App|[[Wikipedia:Jungle Disk|Jungle Disk]]|An online backup tool that stores its data in Amazon S3 or Rackspace Cloud Files.
** A Nautilus extension.
+
** A GNOME Files extension.
 
** Only paid plans available.
 
** Only paid plans available.
|http://www.jungledisk.com/|{{AUR|nautilus-jungledisk}}}}
+
|http://www.jungledisk.com/|{{AUR|nautilus-jungledisk}}{{Broken package link|{{aur-mirror|nautilus-jungledisk}}}}}}
  
* {{App|Tarsnap|A secure online backup service for BSD, Linux, OS X, Solaris and Windows (through Cygwin).
+
* {{App|[[Wikipedia:Mega (website)|MEGA]]|Successor to the MegaUpload file-sharing service.
 +
** Free accounts are 50GB with paid plans available for more space.
 +
** Offers encryption and de-duplication.
 +
** Usually accessed through its web interface but other tools exist.
 +
|https://mega.co.nz|{{AUR|megatools}}, {{AUR|megasync}}, {{AUR|megafuse}}{{Broken package link|{{aur-mirror|megafuse}}}}}}
 +
 
 +
* {{App|Nutstore|A cloud service that lets you sync and share files anywhere.
 +
** Multiple file folders sync.
 +
** Service for Chinese users.
 +
|http://jianguoyun.com/|{{AUR|nutstore}}}}
 +
 
 +
* {{App|rsync.net|Cloud storage for offsite backups.
 +
** ZFS filesystem, accessible with any SSH/SFTP/SCP tool, running on a UNIX system.
 +
** Simple rsync synchronization with daily automatic ZFS snapshots.
 +
** [http://www.rsync.net/products/attic.html Special discounted price] if used with borg or attic.
 +
|http://www.rsync.net/|[[rsync]]/[[SSH]], {{Pkg|borg}}/{{AUR|attic}}}}
 +
 
 +
* {{App|[[Wikipedia:SpiderOak|SpiderOak]]|An online backup tool for Windows, Mac and Linux users to back up, share, sync, access and store their data.
 +
** Free account holds 2GB as a 60-day trial.
 +
** Includes file sharing and a public directory.
 +
** Incremental backup and sync are both supported.
 +
|https://spideroak.com/|{{AUR|spideroak-one}}}}
 +
 
 +
* {{App|[[Wikipedia:Storage Made Easy|Storage Made Easy]]|Provides unified access to numerous cloud storage services, as well as its own storage.
 +
** Free and paid version available.
 +
** Free account holds 5GB and allows access to up to three other cloud storage providers.
 +
** Supports local directory via fuse, as well as web access.
 +
** Supports many cloud storage services, such as Box, Dropbox, Google Drive, Onedrive, and others.
 +
|http://storagemadeeasy.com/|{{AUR|smestorage}}{{Broken package link|{{aur-mirror|smestorage}}}}}}
 +
 
 +
* {{App|[[Wikipedia:Tarsnap|Tarsnap]]|A secure online backup service for BSD, Linux, OS X, Solaris and Windows (through Cygwin).
 
** Compressed encrypted backups to Amazon S3 Servers.
 
** Compressed encrypted backups to Amazon S3 Servers.
 
** Automate via [[cron]].
 
** Automate via [[cron]].
Line 219: Line 1,175:
 
|http://www.tarsnap.com|{{Pkg|tarsnap}}}}
 
|http://www.tarsnap.com|{{Pkg|tarsnap}}}}
  
* {{App|[[Wikipedia:Wuala|Wuala]]|A secure online storage, file synchronization, versioning and backup service.
+
* {{App|[[Yandex Disk]]|Free cloud storage service created by Yandex.ru that gives you access to your photos, videos and documents from any internet-enabled device.|https://disk.yandex.ru/|{{AUR|yandex-disk}}}}
** Closed source, free and paid version available.
+
** Free account holds 5GB.
+
** Includes file sharing and a public directory.
+
** Incremental backup and sync are both supported.
+
** Social networking features.
+
** All files in the cloud are first encrypted locally.
+
|http://www.wuala.com/|{{AUR|wuala}}, {{AUR|wuala-daemon}} – to run as daemon}}
+
  
* {{App|[[Wikipedia:SpiderOak|SpiderOak]]|An online backup tool for Windows, Mac and Linux users to back up, share, sync, access and store[1] their data.
+
==== Multi-service clients ====
** Free and paid version available.
+
 
** Free account holds 2GB.
+
* {{App|[[Déjà Dup]]|A simple GTK+ backup program. It hides the complexity of doing backups the 'right way' (encrypted, off-site, and regular) and uses duplicity as the backend.
** Includes file sharing and a public directory.
+
** Automatic, timed backup configurable in GUI.
** Incremental backup and sync are both supported.
+
** Restore wizard.
|https://spideroak.com/|{{AUR|spideroak}}}}
+
** Integrated into the GNOME Files file manager.
 +
** Inherits several features of duplicity.
 +
|https://launchpad.net/deja-dup|{{Pkg|deja-dup}}}}
 +
 
 +
* {{App|Duplicati|Backup client that securely stores encrypted, incremental, compressed backups on cloud storage services and remote file servers. It works with Amazon S3, Windows Live SkyDrive, Google Drive (Google Docs), Rackspace Cloud Files or WebDAV, SSH, FTP (and many more). Duplicati is open source and free.|http://www.duplicati.com/|{{AUR|duplicati-latest}}}}
 +
 
 +
* {{App|[[Duplicity]]|A simple command-line utility which allows encrypted compressed incremental backup to nearly any storage.
 +
** Supports gpg encryption and signing.
 +
** Supports gzip compression.
 +
** Supports full or incremental backups, incremental backup stores only difference between new and old file.
 +
** Supports pushing over [http://duplicity.nongnu.org/duplicity.1.html#sect7 many protocols].
 +
|http://www.nongnu.org/duplicity/|{{Pkg|duplicity}}}}
  
* {{App|[[Ubuntu One]]|An online storage service with sync and sharing across platforms.
+
* {{App|[[Duply]]|Front-end for duplicity which simplifies running it by:
** Free and payed versions available.
+
** keeping recurring settings in profiles per backup job;
** Free account with 5GB.
+
** automated import/export of keys between profile and keyring;
** Mobile access.
+
** enabling batch operations eg. backup_verify_purge;
** Music streaming.
+
** executing pre/post scripts;
|https://one.ubuntu.com/services/|{{Pkg|ubuntuone-client}}}}
+
** precondition checking for flawless duplicity operation.
 +
|http://www.duply.net/|{{AUR|duply}}}}
  
* {{App|Packrat|A simple, modular backup system that uses [[Wikipedia:DAR (Disk Archiver)|DAR]] to take full or incremental backups of files and can store them locally, on a remote system via SSH, or on Amazon S3.|http://www.zeroflux.org/projects|{{AUR|packrat}}}}
+
* {{App|rclone|Rclone is a command line program to sync files and directories to and from Google Drive, Amazon S3, Openstack Swift / Rackspace cloud files / Memset Memstore, Dropbox, Google Cloud Storage and The local filesystem.|http://rclone.org/|{{Pkg|rclone}}}}
  
== Cooperative storage cloud backups ==
+
=== Cooperative ===
  
 
A [[Wikipedia:Cooperative_storage_cloud|cooperative storage cloud]] is a decentralized model of networked online storage where data is stored on multiple computers, hosted by the participants cooperating in the cloud.  
 
A [[Wikipedia:Cooperative_storage_cloud|cooperative storage cloud]] is a decentralized model of networked online storage where data is stored on multiple computers, hosted by the participants cooperating in the cloud.  
Line 254: Line 1,215:
 
** In addition to paid support, support plans in exchange for extended contribution (300GB+) exist.
 
** In addition to paid support, support plans in exchange for extended contribution (300GB+) exist.
 
** Automatic and incremental backups.
 
** Automatic and incremental backups.
** Data is encrypted before leaving the computer, though keys are also stored on the Symform's servers.
+
** Data is encrypted before leaving the computer, though keys are also stored on the Symform's servers.[http://virtualserverguy.com/blog/2012/12/19/symform-security-analysis]
 
** Customizable limits for bandwidth consumption.
 
** Customizable limits for bandwidth consumption.
 
** Ability to have a local copy ("Hot Copy") of the backed up data on a different disk or computer.
 
** Ability to have a local copy ("Hot Copy") of the backed up data on a different disk or computer.
 
** Ability to have synchronized folders between nodes (Dropbox-like).
 
** Ability to have synchronized folders between nodes (Dropbox-like).
 
** Closed source, using mono. Windows clients available.
 
** Closed source, using mono. Windows clients available.
|http://www.symform.com/|{{AUR|symform}}}}
+
|http://www.symform.com/|{{AUR|symform}}{{Broken package link|{{aur-mirror|symform}}}}}}
  
== Non-incremental backups ==
+
=== Custom infrastructure ===
Another type of backups are those used in case of a disaster. These include application that allow easy backup of entire filesystems and recovery in case of failure, usually in the form of a Live CD or USB drive. The contains complete system images from one or more specific points in time and are frequently used by to record known good configurations.
+
  
* {{App|Q7Z|P7Zip GUI for Linux, which attempts to simplify data compression and backup.  It can create the following archive types: 7z, BZip2, Zip, GZip, Tar.
+
* {{App|Cozy|A personal cloud you can hack, host and delete.|https://cozy.io|{{AUR|cozy-standalone}} {{AUR|cozy-nginx}} {{AUR|cozy-apache}}}}
** Updates existing archives quickly.
+
** Backup multiple folders to a storage location.
+
** Create or extract protected archives.
+
** Lessen effort by using archiving profiles and lists.
+
|http://k7z.sourceforge.net/|{{AUR|q7z}}}}
+
  
* {{App|[[Partclone]]|A tool that can be used to back up and restore a partition while considering only used blocks.
+
* {{App|[[OpenStack]]|Controls large pools of compute, storage, and networking resources throughout a datacenter, managed through a dashboard or via the OpenStack API. OpenStack works with popular enterprise and open source technologies making it ideal for heterogeneous infrastructure.|http://www.openstack.org/}}
** Supports ext2, ext3, hfs+, reiser3.5, reiser3.6, reiser4, ext4 and btrfs.
+
** Supports compression.
+
|http://partclone.nchc.org.tw/trac/|{{AUR|partclone}}}}
+
  
* {{App|[[Wikipedia:Redo Backup and Recovery|Redo Backup and Recovery]]|A backup and disaster recovery application that runs from a bootable Linux CD image.
+
* {{App|[[ownCloud]]|Software suite that provides a location-independent storage area for data.|http://owncloud.org/|{{Pkg|owncloud}}}}
** Is capable of bare-metal backup and recovery of disk partitions.
+
** Uses [http://www.xpud.org/ xPUD] and [[Partclone]] for the backend.
+
|http://www.redobackup.org/|{{AUR?|redobackup}}}}
+
  
* {{App|[[Wikipedia:Clonezilla|Clonezilla]]|A disaster recovery, disk cloning, disk imaging and deployment solution.
+
* {{App|[[Pydio]]|Mature open source web application for file sharing and synchronization.|https://pydio.com/|{{AUR|pydio}}}}
** Boots from live CD, USB flash drive, or PXE server.
+
** Supports ext2, ext3, ext4, reiserfs, reiser4, xfs, jfs, btrfs FAT32, NTFS, HFS+ and others.
+
** Uses Partclone (default), Partimage (optional), ntfsclone (optional), or dd to image or clone a partition.
+
** Multicasting server to restore to many machines at once.
+
|http://clonezilla.org/|{{AUR|clonezilla}}}}
+
  
* {{App|[[Wikipedia:Partimage|Partimage]]|A disk cloning utility for Linux/UNIX environments.
+
* {{App|[[Seafile]]|Open source cloud storage system, with advanced support for file syncing, privacy protection and teamwork.|http://seafile.com/|{{AUR|seafile-server}} {{AUR|seafile-client}} {{AUR|seafile-client-cli}} {{AUR|seafile-client-qt5}}{{Broken package link|package not found}}}}
** Has a Live CD.
+
** Supports the most popular filesystems on Linux, Windows and Mac OS.
+
** Compression.
+
** Saving to multiple CDs or DVDs or across a network using Samba/NFS.
+
|http://www.partimage.org/Main_Page|{{Pkg|partimage}}}}
+
  
* {{App|FSArchiver|A safe and flexible file-system backup and deployment tool
+
* {{App|StackSync|Open-source scalable Personal Cloud that can adapt to the necessities of organizations. It puts a special emphasis on security by encrypting data on the client side before it is sent to the server.|http://stacksync.org/}}
** Support for basic file attributes (permissions, owner, ...).
+
** Support for multiple file-systems per archive.
+
** Support for extended attributes (they are used by SELinux).
+
** Support the basic file-system attributes (label, uuid, block-size) for all linux file-systems.
+
** Support for [http://www.fsarchiver.org/Cloning-ntfs ntfs filesystems] (ability to create flexible clones of a Windows partitions).
+
** Checksumming of everything which is written in the archive (headers, data blocks, whole files).
+
** Ability to restore an archive which is corrupt (it will just skip the current file).
+
** Multi-threaded lzo, gzip, bzip2, lzma compression.
+
** Support for splitting large archives into several files with a fixed maximum size.
+
** Encryption of the archive using a password. Based on blowfish from libcrypto from [[OpenSSL]].
+
** Support backup of a mounted root filesystem (-A option).
+
|http://www.fsarchiver.org/Main_Page|{{Pkg|fsarchiver}}}}
+
  
* {{App|[[Wikipedia:Mondo Rescue|Mondo Rescue]]|A disaster recovery solution to create backup media that can be used to redeploy the damaged system.
+
* {{App|Syncany|Cloud storage and filesharing application with a focus on security and abstraction of storage.|https://www.syncany.org/|{{AUR|syncany}}}}
** Image-based backups, supporting Linux/Windows.
+
 
** Compression rate is adjustable.
+
== Version control systems ==
** Can backup live systems (without having to halt it).
+
 
** Can split image over many files.
+
{{Merge|List_of_applications#Work_environment|Also drop the extra bullets, the Wikipedia comparison table is much better than this.}}
** Supports booting to a Live CD to perform a full restore.
+
** Can backup/restore over NFS, from CDs, tape drives and and other media.
+
** Can verify backups.
+
|http://www.mondorescue.org/|{{AUR|mondo}}}}
+
  
== Versioning systems ==
 
 
These are traditionally used for keeping track of software development; but if you want to have a simple way to manage your config files in one directory, it might be a good solution.
 
These are traditionally used for keeping track of software development; but if you want to have a simple way to manage your config files in one directory, it might be a good solution.
  
=== Version control systems ===
+
See also [[Wikipedia:Comparison of revision control software]].
{{Wikipedia|Comparison of revision control software}}.
+
 
 +
* {{App|[[Bazaar]]|A distributed version control system that helps you track project history over time and to collaborate easily with others.
 +
** Similar commands to Subversion.
 +
** Supports working with or without a central server.
 +
** Support for working with some other revision control systems
 +
** Complete Unicode support.
 +
|http://bazaar.canonical.com/en/|{{Pkg|bzr}}}}
 +
 
 +
* {{App|Darcs|A distributed revision control system that was designed to replace traditional, centralized source control systems such as CVS and Subversion.
 +
** Offline mode.
 +
** Easy branching and merging.
 +
** Written in Haskell.
 +
** Not very fast.
 +
|http://darcs.net/|{{Pkg|darcs}}}}
  
 
* {{App|[[Git]]|A distributed revision control and source code management system with an emphasis on speed.
 
* {{App|[[Git]]|A distributed revision control and source code management system with an emphasis on speed.
Line 331: Line 1,266:
 
** Does not handle binary files very well.
 
** Does not handle binary files very well.
 
|http://git-scm.com/|{{Pkg|git}}}}
 
|http://git-scm.com/|{{Pkg|git}}}}
 
* {{App|[[Subversion]]|A full-featured centralized version control system originally designed to be a better CVS.
 
** Renamed/copied/moved/removed files retain full revision history.
 
** Native support for binary files, with space-efficient binary-diff storage.
 
** Costs proportional to change size, not to data size.
 
** Allows arbitrary metadata ("properties") to be attached to any file or directory.
 
|http://subversion.apache.org/|{{Pkg|subversion}}}}
 
  
 
* {{App|[[Mercurial]]|A distributed version control system written in Python and similar in many ways to Git.
 
* {{App|[[Mercurial]]|A distributed version control system written in Python and similar in many ways to Git.
Line 346: Line 1,274:
 
|http://mercurial.selenic.com/|{{Pkg|mercurial}}}}
 
|http://mercurial.selenic.com/|{{Pkg|mercurial}}}}
  
* {{App|[[Wikipedia:Bazaar (software)|Bazaar]]|A distributed version control system that helps you track project history over time and to collaborate easily with others.
+
* {{App|[[Subversion]]|A full-featured centralized version control system originally designed to be a better CVS.
** Similar commands to Subversion.
+
** Renamed/copied/moved/removed files retain full revision history.
** Supports working with or without a central server.
+
** Native support for binary files, with space-efficient binary-diff storage.
** Support for working with some other revision control systems
+
** Costs proportional to change size, not to data size.
** Complete Unicode support.
+
** Allows arbitrary metadata ("properties") to be attached to any file or directory.  
|http://bazaar.canonical.com/en/|{{Pkg|bzr}}}}
+
|http://subversion.apache.org/|{{Pkg|subversion}}}}
 
+
* {{App|[[Wikipedia:Darcs|Darcs]]|A distributed revision control system that was designed to replace traditional, centralized source control systems such as CVS and Subversion.
+
** Offline mode.
+
** Easy branching and merging.
+
** Written in Haskell.
+
** Not very fast.
+
|http://darcs.net/|{{AUR|darcs}}}}
+
 
+
=== VCS-based backups ===
+
  
* {{App|Gibak|A backup system based on [[Git]].
+
== See also ==
** Supports binary diffs.
+
** Uses all of Git's features (such as {{ic|.gitignore}} for filtering files).
+
** Uses Git's hook system to save information that Git does not (permissions, mtime, empty directories, etc).
+
|https://github.com/pangloss/gibak|{{AUR|gibak}}}}
+
* {{App|bup|A fledgling Git-based backup solution written in Python and C.
+
** Uses a rolling checksum algorithm (similar to rsync) to split large files into chunks.
+
** Can back up directly to a remote bup server.
+
** Has an improved index format to allow you to track many files.
+
|https://github.com/bup/bup|{{AUR|bup}}}}
+
* {{App|ColdStorage|Another backup tool using Git at its core, written in [[Qt]].|http://gitorious.org/coldstorage|{{AUR|coldstorage-git}}}}
+
  
== External Resources ==
+
* [[Wikipedia:List of backup software]]
 +
* [[Wikipedia:Comparison of backup software]]
 
* [http://www.halfgaar.net/backing-up-unix Backing up Linux and other Unix(-like) systems]
 
* [http://www.halfgaar.net/backing-up-unix Backing up Linux and other Unix(-like) systems]
 
* [http://www.askapache.com/security/mirror-using-rsync-ssh.html Mirroring an Entire Site using Rsync over SSH]
 
* [http://www.askapache.com/security/mirror-using-rsync-ssh.html Mirroring an Entire Site using Rsync over SSH]
 +
* [http://www.si-journal.org/index.php/JSI/article/view/205 Performance comparison of five remote incremental backup tools: Rsync, Rdiff-backup, Duplicity, Areca and Link-Backup]
 +
* [http://blog.pointsoftware.ch/index.php/howto-local-and-remote-snapshot-backup-using-rsync-with-hard-links/ rsync-snapshot.sh] — Local and remote snapshot backup using rsync with hard links

Latest revision as of 09:51, 26 August 2016

This page lists and compares applications that synchronize data between two or more locations, and those that build on top of such functionality to make incremental copies of important data for backup purposes. Because of their relationship, the two groups share several traits that justify describing them in the same article.

Backup overview

Having backups of important data is a necessary measure to take, since human and machine processing errors are very likely to generate corruption as time passes, and also the physical media where the data is stored is inevitably destined to fail. In order to choose the best program for one's own needs, the following aspects should be considered:

  • The type of backup medium that is going to store the data, e.g. CD, DVD, remote server, external hard drive, etc.
  • The planned frequency of backups, e.g. daily, weekly, monthly, etc.
  • The features expected from the backup solution, e.g. compression, encryption, handles renames, etc.
  • The planned method to restore backups if needed.

Data synchronization

These applications simply keep directories synchronized between multiple locations/machines, in a "mirror" fashion. Nonetheless, most of them still allow storing and reverting to old revisions of modified or deleted files.

See also Wikipedia:Comparison of file synchronization software.

Legend:

  • Name: the application name, linking to the official website.
  • Installation: a link to the main ArchWiki article, if existing, or directly to the package pages.
  • Implementation: the programming language, library, or utility that the application is based on.
  • Delta transfer: only the modified parts of files are transferred.
  • Encrypted transfer: data is encrypted by default when transferred over the network.
  • FS metadata: file system permissions and attributes are synchronized.
  • Resumable: the synchronization can be resumed without restarting it if interrupted.
  • Handles renames: moved/renamed files are detected and not stored or transferred twice; it typically means that a checksum is computed for files or chunks thereof.
  • Version control: the old version of files are backed up (reverse incremental backup).
  • Conflict resolution: the application handles file conflicts, either automatically or interactively, i.e. it does not silently discard conflicting files.
  • Multidirectional: more than 2 locations can be kept in sync together.
  • FS monitoring: the application listens to file system events to trigger the synchronization.
  • CLI: the application is command-line driven, i.e. it is scriptable.
  • Other interfaces: the application has the specified user interfaces, e.g. GUI, TUI, or web-based.
  • Licence: the licence of the server and client applications.
  • Other platforms: supported operating systems other than Linux.
  • Active: whether the project is currently maintained.
  • Specificity: brief notes about special features that notably set the application apart from the others.

Tango-view-fullscreen.pngThis article or section needs expansion.Tango-view-fullscreen.png

Reason: Enter values in the cells marked with "?". Also replace the "Yes" with more specific values and references. (Discuss in Talk:Synchronization and backup programs#)
Name Installation Implementation Delta transfer Encrypted transfer FS metadata Resumable Handles renames Version control Conflict resolution Multidirectional FS monitoring CLI Other interfaces Licence Other platforms Active Specificity
BitTorrent Sync BitTorrent Sync Closed source Yes  ?  ?  ?  ?  ?  ?  ?  ? No Web Proprietary freemium OS X, Windows, Android, iOS, Windows Phone, Amazon Kindle Fire, FreeBSD Yes
FreeFileSync freefilesyncAUR C++  ? SFTP [1]  ?  ? Yes [2] Yes [3]  ? No  ? No Yes GPL Windows, OS X Yes
git-annex git-annex Haskell, git rsync [4] rsync [5]  ?  ?  ? Yes  ? git remotes [6]  ? Yes git-annex assistant GPLv3 OS X, Android Yes
Grsync grsync rsync front-end rsync rsync  ?  ?  ?  ?  ? No  ? No GTK+ GPLv2  ?
gutbackup gutbackupAUR rsync wrapper rsync rsync  ?  ?  ?  ?  ? No  ? Yes No MIT  ?
Jotasync not packaged? search in AUR Java gui for rsync rsync rsync  ?  ?  ?  ?  ? No  ? limited Swing Apache v2 OS X, Windows Yes Integrated scheduler.
luckyBackup luckybackupAUR C++ rsync [7] rsync [8]  ?  ?  ? Yes  ? No  ? limited [9] Qt GPLv3 frozen [10]
osync.sh not packaged? search in AUR Shell rsync rsync  ? Yes  ? Yes  ? No optional [11] Yes No BSD Yes
rdiff-backup rdiff-backup Python 2 Yes Yes Yes  ? No Yes preview changes No No Yes No GPL Win32  ?
rsync rsync C Yes SSH or native protocol Yes Yes No
  • --link-dest with hard links [12]
  • --backup
preview changes No No Yes grsync GPLv3 Win32 Yes Standard install on all Linux distributions.
SparkleShare sparkleshare C#  ?  ?  ?  ?  ?  ?  ?  ?  ? No Yes GPLv3 Windows, OS X  ?
Syncthing Syncthing Go Yes [13] Yes [14] partial [15]  ?  ? Yes [16] renames one file [17] Yes  ? No Web, GTK MPL v2 Windows, OS X, Android, BSD, Solaris Yes
Synkron synkronAUR C++  ?  ?  ?  ?  ?  ?  ? Yes  ? No Qt GPLv2 Windows, OS X  ?
taskd Taskd C++, python, Yes Yes  ? Yes  ?  ?  ? Yes No Yes No MIT Android Yes
Unison Unison OCaml Yes Yes partial [18] optional [19] No Yes [20] interactive No No Yes GTK2 GPL Windows, OS X, FreeBSD, Android Yes [21]
Name Installation Implementation Delta transfer Encrypted transfer FS metadata Resumable Handles renames Version control Conflict resolution Multidirectional FS monitoring CLI Other interfaces Licence Other platforms Active Specificity

Incremental backups

Applications that can do incremental backups remember and take into account what data has been backed up during the last run (so-called "diffs") and eliminate the need to have duplicates of unchanged data. Restoring the data to a certain point in time would require locating the last full backup and all the incremental backups from then to the moment when it is supposed to be restored. This sort of backup is useful for those who do it very often.

See also Dotfiles#Version control.

Legend:

  • Name: the application name, linking to the official website.
  • Installation: a link to the main ArchWiki article, if existing, or directly to the package pages.
  • Implementation: the programming language, library, or utility that the application is based on.
  • Compressed storage: compression is used for storage.
  • Encrypted storage: encryption is used for storage.
  • Delta transfer: only the modified parts of files are transferred.
  • Encrypted transfer: data is encrypted by default when transferred over a network.
  • FS metadata: file system permissions and attributes are backed up.
  • Easy access: the backup is stored plainly in the file system, or is mountable as such.
  • Resumable: the backup can be resumed without restarting it if interrupted.
  • Handles renames: moved/renamed files are detected and not stored or transferred twice; it typically means that a checksum is computed for files or chunks thereof.
  • CLI: the application is command-line driven, i.e. it is scriptable.
  • Other interfaces: the application has the specified user interfaces, e.g. GUI, TUI, or web-based.
  • Licence: the licence of the server and client applications.
  • Other platforms: supported operating systems other than Linux.
  • Active: whether the project is currently maintained.
  • Specificity: brief notes about special features that notably set the application apart from the others.

Single machine

These applications are aimed at backing up data from the machine they are installed on, although the backup destination can be located on an external machine or storage media.

Chunk-based increments

If a file is modified, these applications store only its changed parts at the next snapshot. Compared to #File-based increments applications, these are more space-efficient, especially when large files receive small modifications; on the other hand, the archived snapshots have to be opened with the backup application that created them, since the files have to be reconstructed from the stored binary diffs.

Tango-view-fullscreen.pngThis article or section needs expansion.Tango-view-fullscreen.png

Reason: Enter values in the cells marked with "?". Also replace the "Yes" with more specific values and references. (Discuss in Talk:Synchronization and backup programs#)
Name Installation Implementation Compressed storage Encrypted storage Delta transfer Encrypted transfer FS metadata Easy access Resumable Handles renames CLI Other interfaces Licence Other platforms Active Specificity
Areca Backup arecaAUR Java Zip, Zip64 AES128, AES256 Yes Yes Yes No Pausing only No Yes Yes GPLv2 Windows Yes
Attic atticAUR Python Yes AES256 Yes SSH Yes Yes Yes Yes Yes No BSD Yes
BorgBackup borg Python (Attic fork) lz4, zlib, lzma AES256 Yes SSH Yes[22] Yes[23] Yes[24] Yes Yes third party BSD *BSD, OS X Yes
btar btarAUR[broken link: archived in aur-mirror] C Yes Yes Yes Yes  ? No  ?  ? Yes No GPLv3 Yes Redundancy, indexed extraction, multicore compression, input and output serialisation, tolerance to partial archive errors.
bup bup bup-gitAUR C, Python, git Yes No Yes Yes Immature Yes[25] pick up where you left off [26] Yes Yes third party GPLv2 Windows, OS X, NetBSD, Solaris Yes Same storage format as git
bups bupsAUR bup frontend Yes No Yes Yes Immature Yes pick up where you left off [27] Yes Yes GTK 3 MIT Yes
Déjà Dup Déjà Dup duplicity front-end Yes Yes Yes Yes  ? No Yes No Yes GTK+ GPLv3 Yes Integrated into GNOME Files.
Duplicati duplicati-latestAUR C# Yes Yes Yes Yes scheduled for 2.0 release No Pausing only No Yes Yes LGPL Windows Yes
Duplicity Duplicity librsync gzip gpg Yes Yes  ? No Yes No Yes Déjà Dup GPL Yes
Duply Duply duplicity front-end Yes Yes Yes Yes  ? No Yes No Yes No GPLv2 Yes
Kup Backup System kup rsync, bup front-end Yes Yes Yes Yes Immature Yes No Yes bup Qt GPLv2 Yes
obnam obnamAUR Python Yes GnuPG Yes Yes  ? Yes checkpoints every 100MB  ? Yes No GPLv3 Yes
ZBackup zbackupAUR C++ LZMA, LZO AES Yes Yes  ? planned [28] No Kinda through tar Yes No GPLv2 Yes Repository consists of immutable files.
Name Installation Implementation Compressed storage Encrypted storage Delta transfer Encrypted transfer FS metadata Easy access Resumable Handles renames CLI Other interfaces Licence Other platforms Active Specificity

File-based increments

If a file is modified, these applications store its new version entirely at the next snapshot. Compared to #Chunk-based increments applications, these are less space-efficient, especially when large files receive small modifications; on the other hand, often the archived snapshots can be opened without the need to have the backup application installed.

Specific legend:

  • Hard links: whether unmodified files are stored as hard links to previous versions.

Tango-view-fullscreen.pngThis article or section needs expansion.Tango-view-fullscreen.png

Reason: Enter values in the cells marked with "?". Also replace the "Yes" with more specific values and references. (Discuss in Talk:Synchronization and backup programs#)
Name Installation Implementation Compressed storage Encrypted storage Delta transfer Encrypted transfer FS metadata Easy access Resumable Handles renames Hard links CLI Other interfaces Licence Other platforms Active Specificity
Back In Time Back In Time Python, rsync, diff No No rsync rsync rsync Yes No No Yes [29] Yes Qt GPLv2 Yes
DAR (Disk ARchive) darAUR C++ special archive format Yes  ? Yes  ?  ?  ?  ? No [30] Yes DarGUI GPL Windows, Solaris, FreeBSD, NetBSD, MacOS X Yes Automatic backup using cron is possible with sarabAUR[broken link: archived in aur-mirror].
DarGUI darguiAUR DAR front-end Yes Yes  ? Yes  ?  ?  ?  ? No [31] No GTK GPL Windows  ?
hdup[dead link 2016-07-11] hdupAUR C bzip, gzip, lzop gpg  ? SSH  ? No No No No Yes No GPLv2 No Multiple backup targets.
Link-Backup link-backupAUR Python No No  ? SSH  ?  ? Yes Yes No [32] Yes No MIT No It copies itself to the server.
rdup rdupAUR C tar.gz gpg, blowfish and others  ?  ?  ? Yes  ? No Yes Yes No GPLv3 No Set of command-line tools.
rsnapshot rsnapshot rsync No No Yes Yes  ?  ?  ?  ? Yes [33] Yes No GPLv2 Win32 Yes
sbackup sbackupAUR Python gzip, bzip2 No  ? SSH  ? No No No No No GTK GPLv3 Yes
TimeShift timeshiftAUR rsync No No rsync rsync  ?  ?  ?  ? Yes No GTK GPLv3 Designed for full-system backups to dedicated devices. Yes
Name Installation Implementation Compressed storage Encrypted storage Delta transfer Encrypted transfer FS metadata Easy access Resumable Handles renames Hard links CLI Other interfaces Licence Other platforms Active Specificity

Network oriented

These applications have been designed to centralize the backup of several machines connected to a network, through a server-client model. In general they are more complicated to deploy, compared to #Single machine solutions.

Specific legend:

  • Increment type: the strategy used to reduce used space by deduplicating data (i.e., besides compression).
    • file-based: if a file is modified, the entire new version is stored at each snapshot.
      • hard-links: whether unmodified files are stored as hard links to previous versions.
    • chunk-based: only the modified parts of files are stored at each snapshot.

Tango-view-fullscreen.pngThis article or section needs expansion.Tango-view-fullscreen.png

Reason: Enter values in the cells marked with "?". Also replace the "Yes" with more specific values and references. (Discuss in Talk:Synchronization and backup programs#)
Name Installation Implementation Compressed storage Encrypted storage Delta transfer Encrypted transfer FS metadata Easy access Resumable Handles renames Increment type CLI Other interfaces Licence Other platforms Active Specificity
BackupPC BackupPC Perl Yes No Yes Yes Yes No Yes  ? file-based, hard links [34] No Web GPLv2 Any (no client needed) Yes Identical files across backups of the same or different clients are stored only once.
Bacula bacula-* in AUR C++ Yes Yes  ? Yes  ?  ? Yes  ? file-based [35] Yes GUI, Web AGPLv3 Windows, OS X Yes
burp burp-backupAUR librsync Yes Yes Yes Yes  ?  ?  ?  ? chunk-based [36] Yes burp-ui AGPLv3 Windows Yes
SafeKeep safekeepAUR rdiff-backup No No  ? Yes  ?  ?  ?  ? chunk-based [37] Yes No GPL No Integrates with LVM and databases to create consistent backups. Bandwidth throttling.
Snebu snebuAUR[broken link: archived in aur-mirror] C Yes No  ? Yes  ?  ?  ?  ?  ? Yes No GPLv3  ? Supports arbitrary retention schedules.
Synbak synbak Multitool wrapper Yes No Yes Yes Yes  ?  ?  ?  ? No Web GPLv3 Yes Unifies several backup methods.
Name Installation Implementation Compressed storage Encrypted storage Delta transfer Encrypted transfer FS metadata Easy access Resumable Handles renames Increment type CLI Other interfaces Licence Other platforms Active Specificity

Cloud storage

Merge-arrows-2.pngThis article or section is a candidate for merging with List of applications#File sharing.Merge-arrows-2.png

Notes: Remove the extra bullet points: the Wikipedia comparison table, and the respective webpages and Wikipedia articles do a better job at describing them. (Discuss in Talk:Synchronization and backup programs#)

Third-party services

See also Wikipedia:Comparison of online backup services.

  • Amazon S3 — Amazon Simple Storage Service (Amazon S3), provides developers and IT teams with secure, durable, highly-scalable object storage. Amazon S3 is easy to use, with a simple web service interface to store and retrieve any amount of data from anywhere on the web. With Amazon S3, you pay only for the storage you actually use. There is no minimum fee and no setup cost.
http://aws.amazon.com/s3/ || s3cmd
  • CloudBacko — Enterprise-grade cloud backup tool for Linux, Mac and Windows.
    • Closed source. Free, Lite and Pro versions available.
    • Written in Java.
    • Encrypted backup to multiple cloud destinations.
    • Supports multiple cloud destinations combined as one storage pool.
    • No installation required in Free version.
    • GUI frontend for Linux in Pro version.
    • Virtual machine backup available in Pro version.
http://www.cloudbacko.com/ || not packaged? search in AUR
  • CrashPlan — An online/offsite backup solution.
    • Unlimited online space for very reasonable pricing.
    • Automatic and incremental backups to multiple destinations.
    • Intuitive GUI.
    • Offers encryption and de-duplication.
    • Software is free for local use.
    • Restore prevents simultaneous backing up
http://www.crashplan.com/ || crashplanAUR
  • Dropbox — A popular file-sharing service.
    • A daemon monitors a specified directory, and uploads incremental changes to dropbox.com.
    • Changes automatically show up on your other computers.
    • Includes file sharing and a public directory.
    • You can recover deleted files.
    • Community written add-ons.
    • Free accounts have 2GB storage.
http://www.dropbox.com || dropboxAUR nautilus-dropboxAUR
  • Google Drive — A file storage and synchronization service provided by Google.
    • Provides cloud storage, file sharing and collaborative editing.
    • Multiple clients are available.
https://drive.google.com || google-drive-ocamlfuseAUR (free), driveAUR (free), griveAUR (free), gdrivefsAUR (free), insync (non-free)
  • iDrive — Universal Online Backup.
    • Multiple Device Backup.
    • Online File Sync.
    • Real-Time Backup.
    • Backup and Access from Mobile Devices.
    • Remote Manage.
    • No GUI Front end for Linux, command line based. A wrapper script is available to make it easier to use.
https://www.idrive.com/ || idevsutilAUR[broken link: archived in aur-mirror], idrive-wrapperAUR[broken link: archived in aur-mirror]
  • Jungle Disk — An online backup tool that stores its data in Amazon S3 or Rackspace Cloud Files.
    • A GNOME Files extension.
    • Only paid plans available.
http://www.jungledisk.com/ || nautilus-junglediskAUR[broken link: archived in aur-mirror]
  • MEGA — Successor to the MegaUpload file-sharing service.
    • Free accounts are 50GB with paid plans available for more space.
    • Offers encryption and de-duplication.
    • Usually accessed through its web interface but other tools exist.
https://mega.co.nz || megatoolsAUR, megasyncAUR, megafuseAUR[broken link: archived in aur-mirror]
  • Nutstore — A cloud service that lets you sync and share files anywhere.
    • Multiple file folders sync.
    • Service for Chinese users.
http://jianguoyun.com/ || nutstoreAUR
  • rsync.net — Cloud storage for offsite backups.
    • ZFS filesystem, accessible with any SSH/SFTP/SCP tool, running on a UNIX system.
    • Simple rsync synchronization with daily automatic ZFS snapshots.
    • Special discounted price if used with borg or attic.
http://www.rsync.net/ || rsync/SSH, borg/atticAUR
  • SpiderOak — An online backup tool for Windows, Mac and Linux users to back up, share, sync, access and store their data.
    • Free account holds 2GB as a 60-day trial.
    • Includes file sharing and a public directory.
    • Incremental backup and sync are both supported.
https://spideroak.com/ || spideroak-oneAUR
  • Storage Made Easy — Provides unified access to numerous cloud storage services, as well as its own storage.
    • Free and paid version available.
    • Free account holds 5GB and allows access to up to three other cloud storage providers.
    • Supports local directory via fuse, as well as web access.
    • Supports many cloud storage services, such as Box, Dropbox, Google Drive, Onedrive, and others.
http://storagemadeeasy.com/ || smestorageAUR[broken link: archived in aur-mirror]
  • Tarsnap — A secure online backup service for BSD, Linux, OS X, Solaris and Windows (through Cygwin).
    • Compressed encrypted backups to Amazon S3 Servers.
    • Automate via cron.
    • Incremental backups.
    • Backup any files or directories.
    • Command line only client.
    • Pay only for usage (bandwidth and storage).
http://www.tarsnap.com || tarsnap
  • Yandex Disk — Free cloud storage service created by Yandex.ru that gives you access to your photos, videos and documents from any internet-enabled device.
https://disk.yandex.ru/ || yandex-diskAUR

Multi-service clients

  • Déjà Dup — A simple GTK+ backup program. It hides the complexity of doing backups the 'right way' (encrypted, off-site, and regular) and uses duplicity as the backend.
    • Automatic, timed backup configurable in GUI.
    • Restore wizard.
    • Integrated into the GNOME Files file manager.
    • Inherits several features of duplicity.
https://launchpad.net/deja-dup || deja-dup
  • Duplicati — Backup client that securely stores encrypted, incremental, compressed backups on cloud storage services and remote file servers. It works with Amazon S3, Windows Live SkyDrive, Google Drive (Google Docs), Rackspace Cloud Files or WebDAV, SSH, FTP (and many more). Duplicati is open source and free.
http://www.duplicati.com/ || duplicati-latestAUR
  • Duplicity — A simple command-line utility which allows encrypted compressed incremental backup to nearly any storage.
    • Supports gpg encryption and signing.
    • Supports gzip compression.
    • Supports full or incremental backups, incremental backup stores only difference between new and old file.
    • Supports pushing over many protocols.
http://www.nongnu.org/duplicity/ || duplicity
  • Duply — Front-end for duplicity which simplifies running it by:
    • keeping recurring settings in profiles per backup job;
    • automated import/export of keys between profile and keyring;
    • enabling batch operations eg. backup_verify_purge;
    • executing pre/post scripts;
    • precondition checking for flawless duplicity operation.
http://www.duply.net/ || duplyAUR
  • rclone — Rclone is a command line program to sync files and directories to and from Google Drive, Amazon S3, Openstack Swift / Rackspace cloud files / Memset Memstore, Dropbox, Google Cloud Storage and The local filesystem.
http://rclone.org/ || rclone

Cooperative

A cooperative storage cloud is a decentralized model of networked online storage where data is stored on multiple computers, hosted by the participants cooperating in the cloud.

  • Symform — A peer-to-peer cloud backup service.
    • Unlimited free backup in exchange for 2:1 storage space contribution with an always-connected device (at least 80% uptime).
    • Payment options exist.
    • First 10GB of backup storage is free (no contribution needed).
    • In addition to paid support, support plans in exchange for extended contribution (300GB+) exist.
    • Automatic and incremental backups.
    • Data is encrypted before leaving the computer, though keys are also stored on the Symform's servers.[38]
    • Customizable limits for bandwidth consumption.
    • Ability to have a local copy ("Hot Copy") of the backed up data on a different disk or computer.
    • Ability to have synchronized folders between nodes (Dropbox-like).
    • Closed source, using mono. Windows clients available.
http://www.symform.com/ || symformAUR[broken link: archived in aur-mirror]

Custom infrastructure

  • Cozy — A personal cloud you can hack, host and delete.
https://cozy.io || cozy-standaloneAUR cozy-nginxAUR cozy-apacheAUR
  • OpenStack — Controls large pools of compute, storage, and networking resources throughout a datacenter, managed through a dashboard or via the OpenStack API. OpenStack works with popular enterprise and open source technologies making it ideal for heterogeneous infrastructure.
http://www.openstack.org/ || not packaged? search in AUR
  • ownCloud — Software suite that provides a location-independent storage area for data.
http://owncloud.org/ || owncloud
  • Pydio — Mature open source web application for file sharing and synchronization.
https://pydio.com/ || pydioAUR
  • Seafile — Open source cloud storage system, with advanced support for file syncing, privacy protection and teamwork.
http://seafile.com/ || seafile-serverAUR seafile-clientAUR seafile-client-cliAUR seafile-client-qt5AUR[broken link: package not found]
  • StackSync — Open-source scalable Personal Cloud that can adapt to the necessities of organizations. It puts a special emphasis on security by encrypting data on the client side before it is sent to the server.
http://stacksync.org/ || not packaged? search in AUR
  • Syncany — Cloud storage and filesharing application with a focus on security and abstraction of storage.
https://www.syncany.org/ || syncanyAUR

Version control systems

Merge-arrows-2.pngThis article or section is a candidate for merging with List_of_applications#Work_environment.Merge-arrows-2.png

Notes: Also drop the extra bullets, the Wikipedia comparison table is much better than this. (Discuss in Talk:Synchronization and backup programs#)

These are traditionally used for keeping track of software development; but if you want to have a simple way to manage your config files in one directory, it might be a good solution.

See also Wikipedia:Comparison of revision control software.

  • Bazaar — A distributed version control system that helps you track project history over time and to collaborate easily with others.
    • Similar commands to Subversion.
    • Supports working with or without a central server.
    • Support for working with some other revision control systems
    • Complete Unicode support.
http://bazaar.canonical.com/en/ || bzr
  • Darcs — A distributed revision control system that was designed to replace traditional, centralized source control systems such as CVS and Subversion.
    • Offline mode.
    • Easy branching and merging.
    • Written in Haskell.
    • Not very fast.
http://darcs.net/ || darcs
  • Git — A distributed revision control and source code management system with an emphasis on speed.
    • Very easy creation, merging, and deletion of branches.
    • Nearly all operations are performed locally, giving it a huge speed advantage on centralized systems.
    • Has a "staging area" or "index", this is an intermediate area where commits can be formatted and reviewed before completing the commit.
    • Does not handle binary files very well.
http://git-scm.com/ || git
  • Mercurial — A distributed version control system written in Python and similar in many ways to Git.
    • Platform independent.
    • Support for extensions.
    • A set of commands consistent with Subversion.
    • Supports tags.
http://mercurial.selenic.com/ || mercurial
  • Subversion — A full-featured centralized version control system originally designed to be a better CVS.
    • Renamed/copied/moved/removed files retain full revision history.
    • Native support for binary files, with space-efficient binary-diff storage.
    • Costs proportional to change size, not to data size.
    • Allows arbitrary metadata ("properties") to be attached to any file or directory.
http://subversion.apache.org/ || subversion

See also