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From the project home page:

aria2 is a lightweight multi-protocol & multi-source command-line download utility. It supports HTTP/HTTPS, FTP, BitTorrent and Metalink. aria2 can be manipulated via built-in JSON-RPC and XML-RPC interfaces.


Install aria2 from official repositories.

You may also want to install aria2-systemd to use aria2 as daemon.


The executable name for the aria2 package is aria2c. This legacy naming convention has been retained for backwards compatibility.



aria2 looks to $XDG_CONFIG_HOME/aria2/aria2.conf for a set of global configuration options by default. This behavior can be modified with the --conf-path switch:

  • Download aria2.example.rar using the options specified in the configuration file /file/aria2.rapidshare
$ aria2c --conf-path=/file/aria2.rapidshare

If $XDG_CONFIG_HOME/aria2/aria2.conf exists and the options specified in /file/aria2.rapidshare are desired, the --no-conf switch must be appended to the command:

  • Do not use the default configuration file and download aria2.example.rar using the options specified in the configuration file /file/aria2.rapidshare
$ aria2c --no-conf --conf-path=/file/aria2.rapidshare

If $XDG_CONFIG_HOME/aria2/aria2.conf does not yet exist and you wish to simplify the management of configuration options:

$ touch $XDG_CONFIG_HOME/aria2/aria2.conf

Example .bash_alias

alias down='aria2c --conf-path=${HOME}/.aria2/aria2.conf'
alias rapid='aria2c --conf-path=/file/aria2.rapidshare'

Example aria2.conf


This is essentially the same as if running the following:

$ aria2c dir=${HOME}/Desktop file-allocation=none input-file=${HOME}/.aria2/input.conf on-download-complete=exit log-level=warn FILE
Note: The example aria2.conf above may incorrectly use the $HOME variable. Some users have reported the curly brace syntax to explicitly create a separate ${HOME} subdirectory in the aria2 working directory. Such a directory may be difficult to traverse as bash will consider it to be the $HOME environment variable. For now, it is recommended to use absolute path names in aria2.conf.

Option details

Continue downloading a partially downloaded file if a corresponding control file exists.
Store the downloaded file(s) in ~/Desktop.
Do not pre-allocate disk space before downloading begins. (Default: prealloc) 1
Download a list of line, or TAB separated URIs found in ~/.aria2/input.conf
Set log level to output warnings and errors only. (Default: debug)
Set a maximum of four (4) connections to each server per file. (Default: 1)
Only split the file if the size is larger than 2*5MB = 10MB. (Default: 20M)
Run the exit command and exit the shell once the download session is complete.
Example input file #1
  • Download aria2-1.10.0.tar.bz2 from two separate sources to ~/Desktop before merging as aria2-1.10.0.tar.bz2
Example input file #2
  • Download aria2-1.9.5.tar.bz2 and save to /file/old as aria2.old.tar.bz2 &
  • Download aria2-1.10.0.tar.bz2 and save to ~/Desktop as

Additional notes

1 --file-allocation=falloc
Recommended for newer file systems such as ext4 (with extents support), btrfs or xfs as it allocates large files (GB) almost instantly. Do not use falloc with legacy file systems such as ext3 as prealloc consumes approximately the same amount of time as standard allocation would while locking the aria2 process from proceeding to download.
Tip: See aria2c --help=#all and the aria2 man page for a complete list of configuration options.

Example aria2.rapidshare


Option details

Set HTTP username as USER_NAME for password-protected logins. This affects all URIs.
Set HTTP password as PASSWORD for password-protected logins. This affects all URIs.
Restart download if a corresponding control file does not exist. (Default: false)
Store the downloaded file(s) in /file/Downloads.
Call posix_fallocate() to allocate disk space before downloading begins. (Default: prealloc)
Enable HTTP/1.1 pipelining to overcome network latency and to reduce network load. (Default: false)
Download a list of single line of TAB separated URIs found in /file/input.rapidshare
Set log level to output errors only. (Default: debug)
Set a maximum of two (2) connections to each server per file. (Default: 1)
Output download progress summary every 120 seconds. (Default: 60) 3

Additional notes

  • Because aria2.rapidshare the contains a username and password, it is advisable to set permissions on the file to 600, or similar.
$ cd /file
$ chmod 600 /file/aria2.rapidshare
$ ls -l
total 128M
-rw------- 1 arch users  167 Aug 20 00:00 aria2.rapidshare
3 summary-interval=0
Supresses download progress summary output and may improve overall performance. Logs will continue to be output according to the value specified in the log-level option.
Tip: The example configuration file can also be applied to Hotfile, DepositFiles,
Note: Command-line options always take precedence over options listed in a configuration file.

Example aria2.bittorrent


Option details

Do not check the hash of the file(s) before seeding. (Default: true)
Set maximum overall upload speed to 1MB/sec. (Default: 0)
Set maximum upload speed per torrent to 128K/sec. (Default: 0)
Seed completed torrents until share ratio reaches 5.0. (Default: 1.0)
Seed completed torrents for 240 minutes.
Note: If both seed-ratio and seed-time are specified, seeding ends when at least one of the conditions is satisfied.

Example aria2.daemon

This configuration can be used to start Aria2 as a service. It can be used in conjunction with several of the frontends listed below. Note that rpc-user and rpc-pass are deprecated, but most frontends have not been ported to the new authentication yet. Do not forget to change user, password and Download directory.




Note: Settings implemented in frontends do not affect aria2's own configuration, and it is uncertain whether the different UIs reuse aria2 configuration if a custom one has been made. Users should ensure their desired parameters are effectively implemented within selected tools and that they are stored persistently (uGet for example has its own aria2's command line which sticks across reboots).

Web UIs

Note: These frontends need aria2c to be started with --enable-rpc in order to work. They are meant to run on your local computer, not on a remote server that downloads using aria
  • YaaW — Yet Another Aria2 Web Frontend in pure HTML/CSS/Javascirpt. || yaaw-gitAUR
  • Webui — Html frontend for aria2. || webui-aria2AUR
  • aria2rpc — Command line tool for connecting to a remote instance of aria2c. If aria2c is installed it can be found under /usr/share/doc/aria2/xmlrpc/aria2rpc. || aria2

Other UIs

Note: These frontends do not need aria2c to be started with --enable-rpc to function.
  • aria2fe — A GUI for the CLI-based aria2 download utility. || aria2feAUR
  • Diana — Command line tool for aria2 || diana-gitAUR
  • downloadm — A download accelerator/manager which uses aria2c as a backend. || downloadmAUR[broken link: archived in aur-mirror]
  • eatmonkey — Download manager for Xfce that works with aria2. || eatmonkeyAUR[broken link: archived in aur-mirror]
  • karia2 — QT4 interface for aria2 download mananger. || karia2-svnAUR
  • uGet — Feature-rich GTK+/CLI download manager which can use aria2 as a back-end by enabling a built-in plugin. || uget
  • yaner — GTK+ interface for aria2 download mananger. || yaner-gitAUR[broken link: archived in aur-mirror]

It is convenient to append a monitor function based on diana in your shell configuration file:

watch -ctn 1 "(echo -e '\033[32mGID\t\t Name\t\t\t\t\t\t\t%\tDown\tSize\tSpeed\tUp\tS/L\tTime\033[36m'; \
diana list| cut -c -112; echo -e '\033[37m'; diana stats)"

Tips and tricks

Download the packages without installing them

Just use the command below:

 # pacman -Sp packages | aria2c -i -

pacman -Sp lists the urls of the packages on stdout, instead of downloading them, then | pipes it to the next command. Finally, The -i in aria2c -i - switch to aria2c means that the urls for files to be downloaded should be read from the file specified, but if - is passed, then read the urls from stdin.

pacman XferCommand

aria2 can be used as the default download manager for the pacman package manager. See the ArchWiki article Improve pacman performance for additional details.

Custom minimal build

Gains in application response can be gleaned by removing unused features and protocols. Further gains can be accomplished by removing support for external libraries with a custom build. Available options are visible through ./configure --help. See the Arch Build System page for further details.

Start aria2c on system boot

Tango-inaccurate.pngThe factual accuracy of this article or section is disputed.Tango-inaccurate.png

Reason: Possible "failed to bind errors" indicate towards a race condition, requires/after and similar should be updated accordingly (Discuss in Talk:Aria2#)

Save the following systemd service file, adjust username and config path according to your setup. Ensure your config is set to deamonize (use daemon=true).

Description=Aria2c download manager

ExecStart=/usr/bin/aria2c --conf-path=/home/aria2/.aria2/aria2.daemon


Then start and/or enable the service.

Changing the User Agent

Some sites may filter the requests based on your User Agent, since Aria2 is not a well known downloader, it may be good to use a most known downloader or browser as the Aria's User Agent. Just use the -U option like this:

$ aria2c -UWget http://some-url-to-download/

You can use whatever you want, like -UMozilla/5.0 and so on.

Using Aria2 with makepkg

You can use Aria2 instead of curl to download source files, just change the DLAGENTS variable as follows:

DLAGENTS=('ftp::/usr/bin/aria2c -UWget -s4 %u -o %o'
          'http::/usr/bin/aria2c -UWget -s4 %u -o %o'
          'https::/usr/bin/aria2c -UWget -s4 %u -o %o'
          'rsync::/usr/bin/rsync -z %u %o'
          'scp::/usr/bin/scp -C %u %o')
Note: Use the -UWget option to change the user agent to Wget. It may prevent problems when downloading from sites that filters the requests based on the user agent to provide different responses on what the users uses to access the URL. Since Aria2 is a lesser known downloader it may be recognized by the site as a browser instead of a downloader, so changing the user agent to Wget may fix it in most cases

See also