https://wiki.archlinux.org/api.php?action=feedcontributions&user=Mauricioca&feedformat=atomArchWiki - User contributions [en]2024-03-28T19:29:40ZUser contributionsMediaWiki 1.41.0https://wiki.archlinux.org/index.php?title=Beginners%27_guide&diff=268385Beginners' guide2013-07-27T19:45:41Z<p>Mauricioca: /* Generate an fstab */</p>
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<div><noinclude><br />
[[Category:Getting and installing Arch]]<br />
[[Category:About Arch]]<br />
[[ar:Beginners' Guide/Installation]]<br />
[[da:Beginners' Guide/Installation]]<br />
[[es:Beginners' Guide/Installation]]<br />
[[hr:Beginners' Guide/Installation]]<br />
[[hu:Beginners' Guide/Installation]]<br />
[[it:Beginners' Guide/Installation]]<br />
[[ja:Beginners' Guide/Installation]]<br />
[[ko:Beginners' Guide/Installation]]<br />
[[nl:Beginners' Guide/Installatie]]<br />
[[pl:Beginners' Guide/Installation]]<br />
[[pt:Beginners' Guide/Installation]]<br />
[[ro:Ghidul începătorilor/Instalare]]<br />
[[ru:Beginners' Guide/Installation]]<br />
[[sr:Beginners' Guide/Installation]]<br />
[[zh-CN:Beginners' Guide/Installation]]<br />
[[zh-TW:Beginners' Guide/Installation]]<br />
{{Tip|This is part of a multi-page article for The Beginners' Guide. '''[[Beginners' Guide|Click here]]''' if you would rather read the guide in its entirety.}}<br />
</noinclude><br />
== Installation ==<br />
<br />
You are now presented with a shell prompt, automatically logged in as root.<br />
<br />
=== Change the language ===<br />
<br />
{{Tip|These are optional for the majority of users. Useful only if you plan on writing in your own language in any of the configuration files, if you use diacritical marks in the Wi-Fi password, or if you would like to receive system messages (e.g. possible errors) in your own language.}}<br />
<br />
By default, the keyboard layout is set to {{ic|us}}. If you have a non-[[Wikipedia:File:KB United States-NoAltGr.svg|US]] keyboard layout, run:<br />
<br />
# loadkeys ''layout''<br />
<br />
...where ''layout'' can be {{ic|fr}}, {{ic|uk}}, {{ic|dvorak}}, {{ic|be-latin1}}, etc. See [[KEYMAP#Keyboard layouts|here]] for a comprehensive list.<br />
<br />
The font should also be changed, because most languages use more glyphs than the 26 letter [[Wikipedia:English alphabet|English alphabet]]. Otherwise some foreign characters may show up as white squares or as other symbols. Note that the name is case-sensitive, so please type it ''exactly'' as you see it:<br />
<br />
# setfont Lat2-Terminus16<br />
<br />
By default, the language is set to English (US). If you would like to change the language for the install process ''(German, in this example)'', remove the {{ic|#}} in front of the [http://www.greendesktiny.com/support/knowledgebase_detail.php?ref=EUH-483 locale] you want from {{ic|/etc/locale.gen}}, along with English (US). Please choose the {{ic|UTF-8}} entry.<br />
<br />
Use {{ic|Ctrl+X}} to exit, and when prompted to save changes, press {{ic|Y}} and {{ic|Enter}} to use the same filename.<br />
<br />
{{hc|# nano /etc/locale.gen|<br />
en_US.UTF-8 UTF-8<br />
de_DE.UTF-8 UTF-8}}<br />
<br />
# locale-gen<br />
# export LANG=de_DE.UTF-8<br />
<br />
Remember, {{ic|LAlt+LShift}} activates and deactivates the keymap.<br />
<br />
=== Establish an internet connection ===<br />
<br />
{{Warning|As of v197, udev no longer assigns network interface names according to the wlanX and ethX naming scheme. If you are coming from a different distribution or are reinstalling Arch and not aware of the new interface naming style, please do not assume that your wireless interface is named wlan0, or that your wired interface is named eth0. You can use the command {{ic|ip link}} to discover the names of your interfaces.}}<br />
<br />
The {{ic|dhcpcd}} network daemon starts automatically during boot and it will attempt to start a wired connection. Try to ping a server to see if a connection was established. For example, Google's webservers:<br />
<br />
{{hc|# ping -c 3 www.google.com|2=<br />
PING www.l.google.com (74.125.132.105) 56(84) bytes of data.<br />
64 bytes from wb-in-f105.1e100.net (74.125.132.105): icmp_req=1 ttl=50 time=17.0 ms<br />
64 bytes from wb-in-f105.1e100.net (74.125.132.105): icmp_req=2 ttl=50 time=18.2 ms<br />
64 bytes from wb-in-f105.1e100.net (74.125.132.105): icmp_req=3 ttl=50 time=16.6 ms<br />
<br />
--- www.l.google.com ping statistics ---<br />
3 packets transmitted, 3 received, 0% packet loss, time 2003ms<br />
rtt min/avg/max/mdev = 16.660/17.320/18.254/0.678 ms}}<br />
<br />
If you get a {{ic|ping: unknown host}} error, first check if there is an issue with your cable or wireless signal strength. If not, you will need to set up the network manually, as explained below. Once a connection is established move on to [[#Prepare the storage drive|Prepare the storage drive]].<br />
<br />
==== Wired ====<br />
<br />
Follow this procedure if you need to set up a wired connection via a static IP address.<br />
<br />
First, disable the dhcpcd service which was started automatically at boot:<br />
<br />
# systemctl stop dhcpcd.service<br />
<br />
Identify the name of your Ethernet interface.<br />
<br />
{{hc|# ip link|<br />
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT<br />
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00<br />
2: enp2s0f0: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN mode DEFAULT qlen 1000<br />
link/ether 00:11:25:31:69:20 brd ff:ff:ff:ff:ff:ff<br />
3: wlp3s0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP mode DORMANT qlen 1000<br />
link/ether 01:02:03:04:05:06 brd ff:ff:ff:ff:ff:ff}}<br />
<br />
In this example, the Ethernet interface is {{ic|enp2s0f0}}. If you are unsure, your Ethernet interface is likely to start with the letter "e", and unlikely to be "lo" or start with the letter "w". You can also use {{ic|iwconfig}} and see which interfaces are not wireless:<br />
<br />
{{hc|# iwconfig|2=<br />
enp2s0f0 no wireless extensions.<br />
wlp3s0 IEEE 802.11bgn ESSID:"NETGEAR97"<br />
Mode:Managed Frequency:2.427 GHz Access Point: 2C:B0:5D:9C:72:BF<br />
Bit Rate=65 Mb/s Tx-Power=16 dBm<br />
Retry long limit:7 RTS thr:off Fragment thr:off<br />
Power Management:on<br />
Link Quality=61/70 Signal level=-49 dBm<br />
Rx invalid nwid:0 Rx invalid crypt:0 Rx invalid frag:0<br />
Tx excessive retries:0 Invalid misc:430 Missed beacon:0<br />
lo no wireless extensions.}}<br />
<br />
In this example, neither {{ic|enp2s0f0}} nor the loopback device have wireless extensions, meaning {{ic|enp2s0f0}} is our Ethernet interface.<br />
<br />
You also need to know these settings:<br />
<br />
* Static IP address.<br />
* Subnet mask.<br />
* Gateway's IP address.<br />
* Name servers' (DNS) IP addresses.<br />
* Domain name (unless you are on a local LAN, in which case you can make it up).<br />
<br />
Activate the connected Ethernet interface (e.g. {{ic|enp2s0f0}}):<br />
<br />
# ip link set enp2s0f0 up<br />
<br />
Add the address:<br />
<br />
# ip addr add ''ip_address''/''subnetmask'' dev ''interface_name''<br />
<br />
For example:<br />
<br />
# ip addr add 192.168.1.2/24 dev enp2s0f0<br />
<br />
For more options, run {{ic|man ip}}.<br />
<br />
Add your gateway like this, substituting your own gateway's IP address:<br />
<br />
# ip route add default via ''ip_address''<br />
<br />
For example:<br />
<br />
# ip route add default via 192.168.1.1<br />
<br />
Edit {{ic|resolv.conf}}, substituting your name servers' IP addresses and your local domain name:<br />
<br />
{{hc|# nano /etc/resolv.conf|<br />
nameserver 61.23.173.5<br />
nameserver 61.95.849.8<br />
search example.com}}<br />
<br />
{{Note|Currently, you may include a maximum of three {{ic|nameserver}} lines. In order to overcome this limitation, you can use a locally caching nameserver like [[Dnsmasq]]. }}<br />
<br />
You should now have a working network connection. If you do not, check the detailed [[Network Configuration]] page.<br />
<br />
==== Wireless ====<br />
<br />
Follow this procedure if you need wireless connectivity (Wi-Fi) during the installation process.<br />
<br />
First, identify the name of your wireless interface.<br />
<br />
{{hc|# iw dev|2=<br />
phy#0<br />
Interface wlp3s0<br />
ifindex 3<br />
wdev 0x1<br />
addr 00:21:6a:5e:52:bc<br />
type managed<br />
}}<br />
<br />
In this example, {{ic|wlp3s0}} is the available wireless interface. If you are unsure, your wireless interface is likely to start with the letter "w", and unlikely to be "lo" or start with the letter "e". <br />
<br />
{{Note|If you do not see output similar to this, then your wireless driver has not been loaded. If this is the case, you must load the driver yourself. Please see [[Wireless Setup]] for more detailed information.}}<br />
<br />
Bring the interface up with:<br />
<br />
# ip link set wlp3s0 up<br />
<br />
A small percentage of wireless chipsets also require firmware, in addition to a corresponding driver. If you get output like {{ic|SIOCSIFFLAGS: No such file or directory}}, this means you will need to manually load the firmware. If unsure, invoke {{ic|dmesg}} to query the kernel log for a firmware request from the wireless chipset. For example, if you have an Intel chipset which requires and has requested firmware from the kernel at boot:<br />
<br />
{{hc|# dmesg <nowiki>|</nowiki> grep firmware|<br />
firmware: requesting iwlwifi-5000-1.ucode}}<br />
<br />
If there is no output, it may be concluded that the system's wireless chipset does not require firmware.<br />
<br />
{{Warning|Wireless chipset firmware packages (for cards which require them) are pre-installed under {{ic|/usr/lib/firmware}} in the live environment (on CD/USB stick) '''but must be explicitly installed to your actual system to provide wireless functionality after you reboot into it!''' Package installation is covered later in this guide. Ensure installation of both your wireless module and firmware before rebooting! See [[Wireless Setup]] if you are unsure about the requirement of corresponding firmware installation for your particular chipset.}}<br />
<br />
Next, use {{Pkg|netctl}}'s {{ic|wifi-menu}} to connect to a network:<br />
<br />
# wifi-menu wlp3s0<br />
<br />
You should now have a working network connection. If you do not, check the detailed [[Wireless Setup]] page.<br />
<br />
Alternatively, use {{ic|iw dev wlp3s0 scan <nowiki>|</nowiki> grep SSID}} to scan for available networks, then connect to a network with:<br />
<br />
# wpa_supplicant -B -i wlp3s0 -c <(wpa_passphrase "''ssid''" "''psk''")<br />
<br />
You need to replace ''ssid'' with the name of your network (e.g. "Linksys etc...") and ''psk'' with your wireless password, '''leaving the quotes around the network name and password.'''<br />
<br />
Finally, you have to give your interface an IP address. This can be set manually or using the dhcp:<br />
<br />
# dhcpcd wlp3s0<br />
<br />
If that does not work, issue the following commands:<br />
<br />
# echo 'ctrl_interface=DIR=/run/wpa_supplicant' > /etc/wpa_supplicant.conf<br />
# wpa_passphrase <ssid> <passphrase> >> /etc/wpa_supplicant.conf<br />
# ip link set <interface> up # May not be needed as dhcpcd should bring it up but may be needed for wpa_supplicant.<br />
# wpa_supplicant -B -D nl80211 -c /foobar.conf -i <interface name><br />
# dhcpcd -A <interface name><br />
<br />
==== Analog modem, ISDN or PPPoE DSL ====<br />
<br />
For xDSL, dial-up and ISDN connections, see [[Direct Modem Connection]].<br />
<br />
==== Behind a proxy server ====<br />
<br />
If you are behind a proxy server, you will need to export the {{ic|http_proxy}} and {{ic|ftp_proxy}} environment variables. See [[Proxy settings]] for more information.<br />
<br />
=== Prepare the storage drive ===<br />
<br />
{{Warning|Partitioning can destroy data. You are '''strongly''' cautioned and advised to backup any critical data before proceeding.}}<br />
<br />
==== Choose a partition table type ====<br />
<br />
You have to choose between [[GUID Partition Table]] (GPT) and [[Master Boot Record]] (MBR). GPT is more modern and recommended for new installations.<br />
<br />
* If you want to setup a system which dual boots with windows, then you have to pay special attention to this choice. See [[Partitioning#Choosing_between_GPT_and_MBR]] for the gory details.<br />
* It is recommended to always use GPT for UEFI boot, as some UEFI firmwares do not allow UEFI-MBR boot.<br />
* Some BIOS systems may have issues with GPT. See http://mjg59.dreamwidth.org/8035.html and http://rodsbooks.com/gdisk/bios.html for more info and possible workarounds.<br />
<br />
{{Note|If you are installing to a USB flash key, see [[Installing Arch Linux on a USB key]].}}<br />
<br />
==== Partitioning tool ====<br />
<br />
Absolute beginners are encouraged to use a graphical partitioning tool. [http://gparted.sourceforge.net/download.php GParted] is a good example, and is [http://gparted.sourceforge.net/livecd.php provided as a "live" CD]. It is also included on live CDs of most Linux distributions such as [[Wikipedia:Ubuntu (operating system)|Ubuntu]] and [[Wikipedia:Linux Mint|Linux Mint]]. A drive should first be [[partitioning|partitioned]] and the partitions should be formatted with a [[File Systems|file system]] before rebooting.<br />
<br />
{{Tip|When using Gparted, selecting the option to create a new partition table gives an "msdos" partition table by default. If you are intending to follow the advice to create a GPT partition table then you need to choose "Advanced" and then select "gpt" from the drop-down menu.}}<br />
<br />
While gparted may be easier to use, if you just want to create a few partitions on a new disk you can get the job done quickly by just using one of the [[Partitioning#Partitioning_tools|fdisk variants]] which are included on the install medium. There are short usage instructions for both [[Partitioning#Gdisk_usage_summary|gdisk]] and [[Partitioning#Fdisk_usage_summary|fdisk]].<br />
<br />
==== Partition scheme ====<br />
<br />
You can decide into how many partitions the disk should be split, and for which directory each partition should be used in the system. The mapping from partitions to directories (frequently called 'mount points') is the [[Partitioning#Partition_scheme|Partition scheme]]. The simplest, and not a bad choice, is to make just one huge {{ic|/}} partition. Another popular choice is to have a {{ic|/}} and a {{ic|/home}} partition.<br />
<br />
{{Box BLUE|Additional required partitions:|<br />
* If you have a [[UEFI]] motherboard, you will need to create an extra [[Unified Extensible Firmware Interface#EFI System Partition|UEFI System Partition]].<br />
* If you have a BIOS motherboard (or plan on booting in BIOS compatibility mode) and you want to setup GRUB on a GPT-partitioned drive, you will need to create an extra [[GRUB#GUID Partition Table (GPT) specific instructions|BIOS Boot Partition]] of size 1007 KiB and {{ic|EF02}} type code. Syslinux does not need one.<br />
}}<br />
<br />
See [[Swap]] for details if you wish to set up a swap partition or swap file. A swap file is easier to resize than a partition and can be created at any point after installation, but cannot be used with a Btrfs filesystem.<br />
<br />
==== Considerations for dualbooting with windows ====<br />
<br />
If you have an existing OS installation, please keep in mind that if you where to just write a completely new partition table to disk then all the data which was previously on disk would be lost. <br />
<br />
The recommended way to setup a linux/windows dual booting system is to first install windows, only using part of the disk for its partitions. When you have finished the windows setup, boot into the linux install environment where you can create additional partitions for linux while leaving the existing windows partitions untouched.<br />
<br />
Some newer computers come pre-installed with Windows 8 which will be using Secure Boot. Arch Linux currently does not support Secure Boot, but some Windows 8 installations have been seen not to boot if Secure Boot is turned off in the BIOS. In some cases it is necessary to turn off both Secure Boot as well as Fastboot in the BIOS options in order to allow Windows 8 to boot without Secure Boot. However there are potential security risks in turning off Secure Boot for booting up Windows 8. Therefore, it may be a better option to keep the Windows 8 install intact and have an independent hard drive for the Linux install - which can then be partitioned from scratch using a GPT partition table. Once that is done, creating several ext4/FAT32/swap partitions on the second drive may be a better way forward if the computer has two drives available. This is often not easy or possible on a small laptop. Currently, Secure Boot is still not in a fully stable state for reliable operation, even for Linux distributions that support it.<br />
<br />
If you have already created your partitions, proceed to [[#Create_filesystems|Create filesystems]].<br />
<br />
Otherwise, see the following example.<br />
<br />
==== Example ====<br />
<br />
The Arch Linux install media includes the following partitioning tools: {{ic|fdisk}}, {{ic|gdisk}}, {{ic|cfdisk}}, {{ic|cgdisk}}, {{ic|parted}}.<br />
<br />
{{Tip|Use the {{ic|lsblk}} command to list the hard disks attached to your system, along with the sizes of their existing partitions. This will help you to be confident you are partitioning the right disk.}}<br />
<br />
<br />
The example system will contain a 15 GB root partition, and a [[Partitioning#/home|home]] partition for the remaining space. Choose either [[MBR]] or [[GPT]]. Do not choose both!<br />
<br />
It should be emphasized that partitioning is a personal choice and that this example is only for illustrative purposes. See [[Partitioning]].<br />
<br />
===== Using cgdisk to create GPT partitions =====<br />
<br />
# cgdisk&nbsp;/dev/sda<br />
<br />
;Root:<br />
* Choose ''New'' (or press {{ic|N}}) – {{ic|Enter}} for the first sector (2048) – type in {{ic|15G}} – {{ic|Enter}} for the default hex code (8300) – {{ic|Enter}} for a blank partition name.<br />
<br />
;Home:<br />
* Press the down arrow a couple of times to move to the larger free space area.<br />
* Choose ''New'' (or press {{ic|N}}) – {{ic|Enter}} for the first sector – {{ic|Enter}} to use the rest of the drive (or you could type in the desired size; for example {{ic|30G}}) – {{ic|Enter}} for the default hex code (8300) – {{ic|Enter}} for a blank partition name.<br />
<br />
Here is what it should look like:<br />
<br />
Part. # Size Partition Type Partition Name<br />
----------------------------------------------------------------<br />
1007.0 KiB free space<br />
1 15.0 GiB Linux filesystem<br />
2 123.45 GiB Linux filesystem<br />
<br />
Double check and make sure that you are happy with the partition sizes as well as the partition table layout before continuing.<br />
<br />
If you would like to start over, you can simply select ''Quit'' (or press {{ic|Q}}) to exit without saving changes and then restart ''cgdisk''.<br />
<br />
If you are satisfied, choose ''Write'' (or press {{ic|Shift+W}}) to finalize and to write the partition table to the drive. Type {{ic|yes}} and choose ''Quit'' (or press {{ic|Q}}) to exit without making any more changes.<br />
<br />
===== Using fdisk to create MBR partitions =====<br />
{{Note|There is also ''cfdisk'', which is similar in UI to ''cgdisk'', but it currently does not automatically align the first partition properly. That is why the classic ''fdisk'' tool is used here.}}<br />
<br />
Launch ''fdisk'' with:<br />
<br />
# fdisk /dev/sda<br />
<br />
Create the first partition:<br />
<br />
# {{ic|Command (m for help):}} type {{ic|n}} and press {{ic|Enter}}<br />
# Partition type: {{ic|Select (default p):}} press {{ic|Enter}}<br />
# {{ic|Partition number (1-4, default 1):}} press {{ic|Enter}}<br />
# {{ic|First sector (2048-209715199, default 2048):}} press {{ic|Enter}}<br />
# {{ic|Last sector, +sectors or +size{K,M,G} (2048-209715199....., default 209715199):}} type {{ic|+15G}} and press {{ic|Enter}}<br />
<br />
Then create a second partition:<br />
<br />
# {{ic|Command (m for help):}} type {{ic|n}} and press {{ic|Enter}}<br />
# Partition type: {{ic|Select (default p):}} press {{ic|Enter}}<br />
# {{ic|Partition number (1-4, default 2):}} press {{ic|Enter}}<br />
# {{ic|First sector (31459328-209715199, default 31459328):}} press {{ic|Enter}}<br />
# {{ic|Last sector, +sectors or +size{K,M,G} (31459328-209715199....., default 209715199):}} press {{ic|Enter}}<br />
<br />
Now preview the new partition table:<br />
<br />
* {{ic|Command (m for help):}} type {{ic|p}} and press {{ic|Enter}}<br />
<br />
{{bc|<br />
Disk /dev/sda: 107.4 GB, 107374182400 bytes, 209715200 sectors<br />
Units &#61; sectors of 1 * 512 &#61; 512 bytes<br />
Sector size (logical/physical): 512 bytes / 512 bytes<br />
I/O size (minimum/optimal): 512 bytes / 512 bytes<br />
Disk identifier: 0x5698d902<br />
<br />
Device Boot Start End Blocks Id System<br />
/dev/sda1 2048 31459327 15728640 83 Linux<br />
/dev/sda2 31459328 209715199 89127936 83 Linux<br />
}}<br />
<br />
Then write the changes to disk:<br />
<br />
* {{ic|Command (m for help):}} type {{ic|w}} and press {{ic|Enter}}<br />
<br />
If everything went well fdisk will now quit with the following message:<br />
{{bc|<br />
The partition table has been altered!<br />
<br />
Calling ioctl() to re-read partition table.<br />
Syncing disks. <br />
}}<br />
<br />
In case this doesn't work because ''fdisk'' encountered an error, you can use the {{ic|q}} command to exit.<br />
<br />
==== Create filesystems ====<br />
<br />
Simply partitioning is not enough; the partitions also need a [[File Systems|filesystem]]. To format the partitions with an ext4 filesystem:<br />
<br />
{{Warning|Double check and triple check that it is actually {{ic|/dev/sda1}} and {{ic|/dev/sda2}} that you want to format. You can use {{ic|lsblk}} to help with this.}}<br />
<br />
# mkfs.ext4 /dev/sda1<br />
# mkfs.ext4 /dev/sda2<br />
<br />
If you have made a partition dedicated to swap (code 82), do not forget to format and activate it with:<br />
<br />
# mkswap /dev/sda''X''<br />
# swapon /dev/sda''X''<br />
<br />
For UEFI, you should format the ESP partition (usually sda1) with:<br />
# mkfs.vfat -F32 /dev/sda1<br />
<br />
=== Mount the partitions ===<br />
<br />
Each partition is identified with a number suffix. For example, {{ic|sda1}} specifies the first partition of the first drive, while {{ic|sda}} designates the entire drive.<br />
<br />
To display the current partition layout:<br />
<br />
# lsblk /dev/sda<br />
<br />
{{Note|Do not mount more than one partition to the same directory. And pay attention, because the mounting order is important.}}<br />
<br />
First, mount the root partition on {{ic|/mnt}}. Following the example above (yours may be different), it would be:<br />
<br />
# mount /dev/sda1 /mnt<br />
<br />
Then mount the home partition and any other separate partition ({{ic|/boot}}, {{ic|/var}}, etc), if you have any:<br />
<br />
# mkdir /mnt/home<br />
# mount /dev/sda2 /mnt/home<br />
<br />
In case you have a UEFI motherboard, mount the UEFI partition:<br />
<br />
# mkdir -p /mnt/boot<br />
# mount /dev/sda''X'' /mnt/boot<br />
<br />
=== Select a mirror ===<br />
<br />
Before installing, you may want to edit the {{ic|mirrorlist}} file and place your preferred mirror first. A copy of this file will be installed on your new system by {{ic|pacstrap}} as well, so it is worth getting it right.<br />
<br />
{{hc|# nano /etc/pacman.d/mirrorlist|<br />
##<br />
## Arch Linux repository mirrorlist<br />
## Sorted by mirror score from mirror status page<br />
## Generated on 2012-MM-DD<br />
##<br />
<br />
<nowiki>Server = http://mirror.example.xyz/archlinux/$repo/os/$arch</nowiki><br />
...}}<br />
<br />
* {{ic|Alt+6}} to copy a {{ic|Server}} line.<br />
* {{ic|PageUp}} key to scroll up.<br />
* {{ic|Ctrl+U}} to paste it at the top of the list.<br />
* {{ic|Ctrl+X}} to exit, and when prompted to save changes, press {{ic|Y}} and {{ic|Enter}} to use the same filename.<br />
<br />
If you want, you can make it the ''only'' mirror available by getting rid of everything else (using {{ic|Ctrl+K}}), but it is usually a good idea to have a few more, in case the first one goes offline.<br />
<br />
{{Tip|<br />
* Use the [https://www.archlinux.org/mirrorlist/ Mirrorlist Generator] to get an updated list for your country. HTTP mirrors are faster than FTP, because of something called [[Wikipedia:Keepalive|keepalive]]. With FTP, pacman has to send out a signal each time it downloads a package, resulting in a brief pause. For other ways to generate a mirror list, see [[Mirrors#Sorting mirrors|Sorting mirrors]] and [[Reflector]].<br />
* [https://archlinux.org/mirrors/status/ Arch Linux MirrorStatus] reports various aspects about the mirrors such as network problems with mirrors, data collection problems, the last time mirrors have been synced, etc.}}<br />
<br />
{{Note|<br />
* Whenever in the future you change your list of mirrors, always remember to force pacman to refresh all package lists with {{ic|pacman -Syy}}. This is considered to be good practice and will avoid possible headaches. See [[Mirrors]] for more information.<br />
* If you are using an older installation medium, your mirrorlist might be outdated, which might lead to problems when updating Arch Linux (see {{Bug|22510}}). Therefore it is advised to obtain the latest mirror information as described above.<br />
* Some issues have been reported in the [https://bbs.archlinux.org/ Arch Linux forums] regarding network problems that prevent pacman from updating/synchronizing repositories (see [https://bbs.archlinux.org/viewtopic.php?id&#61;68944] and [https://bbs.archlinux.org/viewtopic.php?id&#61;65728]). When installing Arch Linux natively, these issues have been resolved by replacing the default pacman file downloader with an alternative (see [[Improve Pacman Performance]] for more details). When installing Arch Linux as a guest OS in [[VirtualBox]], this issue has also been addressed by using "Host interface" instead of "NAT" in the machine properties.}}<br />
<br />
=== Install the base system ===<br />
<br />
The base system is installed using the [https://github.com/falconindy/arch-install-scripts/blob/master/pacstrap.in pacstrap] script.<br />
<br />
The {{ic|-i}} switch can be omitted if you wish to install every package from the ''base'' group without prompting.<br />
<br />
# pacstrap -i /mnt base<br />
<br />
{{Note|<br />
* If pacman fails to verify your packages, check the system time with {{ic|cal}}. If the system date is invalid (e.g. it shows the year 2010), signing keys will be considered expired (or invalid), signature checks on packages will fail and installation will be interrupted. Make sure to correct the system time, either by doing so manually or with the {{Pkg|ntp}} client, and retry running the pacstrap command. Refer to [[Time]] page for more information on correcting system time.<br />
* If pacman complains that {{ic|error: failed to commit transaction (invalid or corrupted package)}}, run the following command:<br />
# pacman-key --init && pacman-key --populate archlinux<br />
}}<br />
<br />
This will give you a basic Arch system. Other packages can be installed later using [[pacman]].<br />
<br />
=== Generate an fstab ===<br />
<br />
Generate an [[fstab]] file with the following command. UUIDs will be used because they have certain advantages (see [[fstab#Identifying filesystems]]). If you would prefer to use labels instead, replace the {{ic|-U}} option with {{ic|-L}}.<br />
<br />
# genfstab -U -p /mnt >> /mnt/etc/fstab<br />
# nano /mnt/etc/fstab<br />
<br />
{{Warning|The fstab file should always be checked after generating it. If you encounter errors running genfstab or later in the install process, do '''not''' run genfstab again; just edit the fstab file.}}<br />
<br />
A few considerations:<br />
<br />
* The last field determines the order in which partitions are checked at start up: use {{ic|1}} for the (non-{{ic|btrfs}}) root partition, which should be checked first; {{ic|2}} for all other partitions you want checked at start up; and {{ic|0}} means 'do not check' (see [[fstab#Field definitions]]).<br />
* All [[btrfs]] partitions should have {{ic|0}} for this field. Normally, you will also want your ''swap'' partition to have {{ic|0}}.<br />
<br />
=== Chroot and configure the base system ===<br />
<br />
Next, we [[chroot]] into our newly installed system:<br />
<br />
# arch-chroot /mnt<br />
<br />
{{Note|Use {{ic|arch-chroot /mnt /bin/bash}} to chroot into a bash shell.}}<br />
At this stage of the installation, you will configure the primary configuration files of your Arch Linux base system. These can either be created if they do not exist, or edited if you wish to change the defaults.<br />
<br />
Closely following and understanding these steps is of key importance to ensure a properly configured system.<br />
<br />
==== Locale ====<br />
<br />
Locales are used by '''glibc''' and other locale-aware programs or libraries for rendering text, correctly displaying regional monetary values, time and date formats, alphabetic idiosyncrasies, and other locale-specific standards.<br />
<br />
There are two files that need editing: {{ic|locale.gen}} and {{ic|locale.conf}}.<br />
<br />
* The {{ic|locale.gen}} file is empty by default (everything is commented out) and you need to remove the {{ic|#}} in front of the line(s) you want. You may uncomment more lines than just English (US), as long as you choose their {{ic|UTF-8}} encoding:<br />
<br />
{{hc|# nano /etc/locale.gen|<br />
en_US.UTF-8 UTF-8<br />
de_DE.UTF-8 UTF-8}}<br />
<br />
# locale-gen<br />
<br />
This will run on every '''glibc''' upgrade, generating all the locales specified in {{ic|/etc/locale.gen}}.<br />
<br />
* The {{ic|locale.conf}} file does not exist by default. Setting only {{ic|LANG}} should be enough. It will act as the default value for all other variables.<br />
<br />
# echo LANG=en_US.UTF-8 > /etc/locale.conf<br />
# export LANG=en_US.UTF-8<br />
<br />
{{Note|If you set some other language than English (US) at the beginning of the install, the above commands would be something like:<br />
# echo LANG<nowiki>=</nowiki>de_DE.UTF-8 > /etc/locale.conf<br />
# export LANG<nowiki>=</nowiki>de_DE.UTF-8<br />
}}<br />
<br />
To use other locales for other {{ic|LC_*}} variables, run {{ic|locale}} to see the available options and add them to {{ic|locale.conf}}. It is not recommended to set the {{ic|LC_ALL}} variable. An advanced example can be found [[Locale#Setting_system-wide_locale|here]].<br />
<br />
==== Console font and keymap ====<br />
<br />
If you set a keymap at [[#Change_the_language|the beginning]] of the install process, load it now, as well, because the environment has changed. For example:<br />
<br />
# loadkeys ''de-latin1''<br />
# setfont Lat2-Terminus16<br />
<br />
To make them available after reboot, edit {{ic|vconsole.conf}}:<br />
<br />
{{hc|# nano /etc/vconsole.conf|2=<br />
KEYMAP=de-latin1<br />
FONT=Lat2-Terminus16<br />
}}<br />
<br />
* {{ic|KEYMAP}} – Please note that this setting is only valid for your TTYs, not any graphical window managers or Xorg.<br />
<br />
* {{ic|FONT}} – Available alternate console fonts reside in {{ic|/usr/share/kbd/consolefonts/}}. The default (blank) is safe, but some foreign characters may show up as white squares or as other symbols. It is recommended that you change it to {{ic|Lat2-Terminus16}}, because according to {{ic|/usr/share/kbd/consolefonts/README.Lat2-Terminus16}}, it claims to support "about 110 language sets".<br />
<br />
* Possible option {{ic|FONT_MAP}} – Defines the console map to load at boot. Read {{ic|man setfont}}. Removing it or leaving it blank is safe.<br />
<br />
See [[Fonts#Console_fonts|Console fonts]] and {{ic|man vconsole.conf}} for more information.<br />
<br />
==== Time zone ====<br />
<br />
Available time zones and subzones can be found in the {{ic|/usr/share/zoneinfo/<Zone>/<SubZone>}} directories.<br />
<br />
To view the available <Zone>, check the directory {{ic|/usr/share/zoneinfo/}}:<br />
<br />
# ls /usr/share/zoneinfo/<br />
<br />
Similarly, you can check the contents of directories belonging to a <SubZone>:<br />
<br />
# ls /usr/share/zoneinfo/Europe<br />
<br />
Create a symbolic link {{ic|/etc/localtime}} to your zone file {{ic|/usr/share/zoneinfo/<Zone>/<SubZone>}} using this command:<br />
<br />
# ln -s /usr/share/zoneinfo/<Zone>/<SubZone> /etc/localtime<br />
<br />
'''Example:'''<br />
<br />
# ln -s /usr/share/zoneinfo/Europe/Minsk /etc/localtime<br />
<br />
==== Hardware clock ====<br />
<br />
Set the hardware clock mode uniformly between your operating systems. Otherwise, they may overwrite the hardware clock and cause time shifts.<br />
<br />
You can generate {{ic|/etc/adjtime}} automatically by using one of the following commands:<br />
<br />
* '''UTC''' (recommended)<br />
<br />
: {{Note|Using [[Wikipedia:Coordinated Universal Time|UTC]] for the hardware clock does not mean that software will display time in UTC.}}<br />
<br />
: {{bc|# hwclock --systohc --utc}}<br />
<br />
To synchronize your "UTC" time over the internet, see [[Network Time Protocol daemon|NTPd]].<br />
<br />
* '''localtime''' (discouraged; used by default in Windows)<br />
<br />
: {{Warning|Using ''localtime'' may lead to several known and unfixable bugs. However, there are no plans to drop support for ''localtime''.}}<br />
<br />
: {{bc|# hwclock --systohc --localtime}}<br />
<br />
If you have (or planning on having) a dual boot setup with Windows:<br />
<br />
* Recommended: Set both Arch Linux and Windows to use UTC. A quick [[Time#UTC in Windows|registry fix]] is needed. Also, be sure to prevent Windows from synchronizing the time on-line, because the hardware clock will default back to ''localtime''.<br />
<br />
* Not recommended: Set Arch Linux to ''localtime'' and disable any time-related services, like [[Network Time Protocol daemon|NTPd]] . This will let Windows take care of hardware clock corrections and you will need to remember to boot into Windows at least two times a year (in Spring and Autumn) when [[Wikipedia:Daylight saving time|DST]] kicks in. So please do not ask on the forums why the clock is one hour behind or ahead if you usually go for days or weeks without booting into Windows.<br />
<br />
==== Kernel modules ====<br />
<br />
{{Tip|This is just an example, you do not need to set it. All needed modules are automatically loaded by udev, so you will rarely need to add something here. Only add modules that you know are missing.}}<br />
<br />
For kernel modules to load during boot, place a {{ic|*.conf}} file in {{ic|/etc/modules-load.d/}}, with a name based on the program that uses them.<br />
<br />
{{hc|# nano /etc/modules-load.d/virtio-net.conf|<br />
# Load 'virtio-net.ko' at boot.<br />
<br />
virtio-net}}<br />
<br />
If there are more modules to load per {{ic|*.conf}}, the module names can be separated by newlines. A good example are the [[VirtualBox#Arch Linux guests|VirtualBox Guest Additions]].<br />
<br />
Empty lines and lines starting with {{ic|#}} or {{ic|;}} are ignored.<br />
<br />
==== Hostname ====<br />
<br />
Set the [[Wikipedia:hostname|hostname]] to your liking (e.g. ''arch''):<br />
<br />
# echo ''myhostname'' > /etc/hostname<br />
<br />
{{Note|There is no need to edit {{ic|/etc/hosts}}.}}<br />
<br />
=== Configure the network ===<br />
<br />
You need to configure the network again, but this time for your newly installed environment. The procedure and prerequisites are very similar to the one described [[#Establish an internet connection|above]], except we are going to make it persistent and automatically run at boot.<br />
<br />
{{Note|<br />
* For more in-depth information on network configration, visit [[Network Configuration]] and [[Wireless Setup]].<br />
* If you would like to use the old interface naming scheme (ie. eth* and wlan*) you can accomplish this by creating an empty file at {{ic|/etc/udev/rules.d/80-net-name-slot.rules}} which will mask the file of the same name located under {{ic|/usr/lib/udev/rules.d}} (alternatively, instead of an empty file, using a symlink to {{ic|/dev/null}} is also an acceptable masking method).<br />
}}<br />
<br />
==== Wired ====<br />
<br />
===== Dynamic IP =====<br />
<br />
; Using dhcpcd<br />
<br />
If you only use a single fixed wired network connection, you do not need a network management service and can simply enable the {{ic|dhcpcd}} service:<br />
<br />
# systemctl enable dhcpcd.service<br />
<br />
: {{Note|If it doesn't work, use: {{ic|# systemctl enable dhcpcd@''interface_name''.service}} }}<br />
<br />
; Using netctl<br />
<br />
Copy a sample profile from {{ic|/etc/netctl/examples}} to {{ic|/etc/netctl}}:<br />
<br />
# cd /etc/netctl<br />
# cp examples/ethernet-dhcp my-network<br />
<br />
Edit the profile as needed (modify {{ic|Interface}}):<br />
<br />
# nano my-network<br />
<br />
Enable the {{ic|my-network}} profile:<br />
<br />
# netctl enable my-network<br />
<br />
; Using netctl-ifplugd<br />
<br />
Alternatively, you can use {{ic|netctl-ifplugd}}, which gracefully handles dynamic connections to new networks:<br />
<br />
Install {{Pkg|ifplugd}}, which is required for {{ic|netctl-ifplugd}}:<br />
<br />
# pacman -S ifplugd<br />
<br />
Then enable for interface that you want:<br />
<br />
# systemctl enable netctl-ifplugd@<interface>.service<br />
<br />
{{Tip|[[Netctl]] also provides {{ic|netctl-auto}}, which can be used to handle wired profiles in conjunction with {{ic|netctl-ifplugd}}.}}<br />
<br />
===== Static IP =====<br />
<br />
; Using netctl<br />
<br />
Copy a sample profile from {{ic|/etc/netctl/examples}} to {{ic|/etc/netctl}}:<br />
<br />
# cd /etc/netctl<br />
# cp examples/ethernet-static my-network<br />
<br />
Edit the profile as needed (modify {{ic|Interface}}, {{ic|Address}}, {{ic|Gateway}} and {{ic|DNS}}):<br />
<br />
# nano my-network<br />
<br />
* Notice the {{ic|/24}} in {{ic|Address}} which is the [[wikipedia:Classless Inter-Domain Routing#CIDR notation|CIDR notation]] of a {{ic|255.255.255.0}} netmask<br />
<br />
Enable above created profile to start it at every boot:<br />
<br />
# netctl enable my-network<br />
<br />
==== Wireless ====<br />
<br />
{{Note|If your wireless adapter requires a firmware (as described in the above [[#Wireless|Establish an internet connection]] section and also [[Wireless Setup#Drivers and firmware|here]]), install the package containing your firmware. Most of the time, the {{Pkg|linux-firmware}} package will contain the needed firmware. Though for some devices, the required firmware might be in its own package. For example:<br />
{{bc|# pacman -S zd1211-firmware}}<br />
See [[Wireless Setup]] for more info.}}<br />
<br />
Install {{Pkg|iw}}, {{Pkg|wpa_supplicant}} and {{Pkg|wpa_actiond}} which you will need to connect to a network:<br />
<br />
# pacman -S iw wpa_supplicant wpa_actiond<br />
<br />
===== Adding wireless networks =====<br />
<br />
; Using wifi-menu<br />
<br />
Install {{Pkg|dialog}}, which is required for {{ic|wifi-menu}}:<br />
<br />
# pacman -S dialog<br />
<br />
After finishing the rest of this installation and rebooting, you can connect to the network with {{ic|wifi-menu ''interface_name''}} (where {{ic|''interface_name''}} is the interface of your wireless chipset).<br />
<br />
# wifi-menu ''interface_name''<br />
<br />
{{Warning|This must be done *after* your reboot when you are no longer chrooted. The process spawned by this command will conflict with the one you have running outside of the chroot. Alternatively, you could just configure a network profile manually using the following templates so that you do not have to worry about using {{ic|wifi-menu}} at all.}}<br />
<br />
; Using manual netctl profiles<br />
<br />
Copy a network profile from {{ic|/etc/netctl/examples}} to {{ic|/etc/netctl}}:<br />
<br />
# cd /etc/netctl<br />
# cp examples/wireless-wpa my-network<br />
<br />
Edit the profile as needed (modify {{ic|Interface}}, {{ic|ESSID}} and {{ic|Key}}):<br />
<br />
# nano my-network<br />
<br />
===== Connect automatically to known networks =====<br />
<br />
Enable the {{ic|netctl-auto}} service, which will connect to known networks and gracefully handle roaming and disconnects:<br />
<br />
# systemctl enable netctl-auto@''interface_name''.service<br />
<br />
{{Tip|[[Netctl]] also provides {{ic|netctl-ifplugd}}, which can be used to handle wired profiles in conjunction with {{ic|netctl-auto}}.}}<br />
<br />
==== Analog modem, ISDN or PPPoE DSL ====<br />
<br />
For xDSL, dial-up and ISDN connections, see [[Direct Modem Connection]].<br />
<br />
=== Create an initial ramdisk environment ===<br />
<br />
{{Tip|Most users can skip this step and use the defaults provided in {{ic|mkinitcpio.conf}}. The initramfs image (from the {{ic|/boot}} folder) has already been generated based on this file when the {{Pkg|linux}} package (the Linux kernel) was installed earlier with {{ic|pacstrap}}.}}<br />
<br />
Here you need to set the right [[Mkinitcpio#HOOKS|hooks]] if the root is on a USB drive, if you use RAID, LVM, or if {{ic|/usr}} is on a separate partition.<br />
<br />
Edit {{ic|/etc/mkinitcpio.conf}} as needed and re-generate the initramfs image with:<br />
<br />
# mkinitcpio -p linux<br />
<br />
{{Note|Arch VPS installations on QEMU (e.g. when using {{ic|virt-manager}}) may need {{ic|virtio}} modules in {{ic|mkinitcpio.conf}} to be able to boot.<br />
<br />
{{hc|# nano /etc/mkinitcpio.conf|2=<br />
MODULES="virtio virtio_blk virtio_pci virtio_net"<br />
}}<br />
}}<br />
<br />
=== Set the root password ===<br />
<br />
Set the root password with:<br />
<br />
# passwd<br />
<br />
=== Install and configure a bootloader ===<br />
<br />
==== For BIOS motherboards ====<br />
<br />
For BIOS systems, two bootloaders are available: Syslinux and GRUB. Choose the bootloader as per your convenience.<br />
<br />
* Syslinux is (currently) limited to loading only files from the partition where it was installed. Its configuration file is considered to be easier to understand. An example configuration can be found [https://bbs.archlinux.org/viewtopic.php?pid=1109328#p1109328 here].<br />
<br />
* GRUB is more feature-rich and supports more complex scenarios. Its configuration file(s) is more similar to a scripting language, which may be difficult for beginners to manually write. It is recommended that they automatically generate one.<br />
<br />
{{Note|Some BIOS systems may have issues with GPT. See http://mjg59.dreamwidth.org/8035.html and http://rodsbooks.com/gdisk/bios.html for more info and possible workarounds.}}<br />
<br />
===== Syslinux =====<br />
<br />
{{Note|If you opted for a GUID partition table (GPT) for your hard drive earlier, you need to install the {{Pkg|gptfdisk}} package now for this next step to work, assuming you have not installed it already.}}<br />
<br />
Install the {{Pkg|syslinux}} package and then use the {{ic|syslinux-install_update}} script to automatically ''install'' the bootloader ({{ic|-i}}), mark the partition ''active'' by setting the boot flag ({{ic|-a}}), and install the ''MBR'' boot code ({{ic|-m}}):<br />
<br />
# pacman -S syslinux<br />
# syslinux-install_update -i -a -m<br />
<br />
Configure {{ic|syslinux.cfg}} to point to the right root partition. This step is vital. If it points to the wrong partition, Arch Linux will not boot. Change {{ic|/dev/sda3}} to reflect your root partition ''(if you partitioned your drive as in [[#Prepare the storage drive|the example]], your root partition is sda1)''. Do the same for the fallback entry.<br />
<br />
{{hc|# nano /boot/syslinux/syslinux.cfg|2=<br />
...<br />
LABEL arch<br />
...<br />
APPEND root=/dev/sda3 ro<br />
...}}<br />
<br />
For more information on configuring and using Syslinux, see [[Syslinux]].<br />
<br />
===== GRUB =====<br />
<br />
Install the {{Pkg|grub}} package and then run {{ic|grub-install}} to install the bootloader:<br />
<br />
{{Note|<br />
* Change {{ic|/dev/sda}} to reflect the drive you installed Arch on. Do not append a partition number (do not use {{ic|sda''X''}}).<br />
* For GPT-partitioned drives on BIOS motherboards, you also need a "BIOS Boot Partition". See [[GRUB#GUID Partition Table (GPT) specific instructions|GPT-specific instructions]] and [[GRUB#Install_to_GPT_BIOS_boot_partition|Install to GPT BIOS boot partition]] in the GRUB page.<br />
}}<br />
<br />
# pacman -S grub<br />
# grub-install --recheck /dev/sda<br />
<br />
{{Note| If it is an installation on virtualbox as guest, while running grub-install command as in above, you might get an error like "/usr/sbin/grub-bios-setup: warning: this GPT partition label contains no BIOS Boot Partition; embedding won't be possible". Executing {{ic|parted -s /dev/sda set 1 bios_grub on}} and then retrying ''grub-install'' should solve the problem.}}<br />
<br />
While using a manually created {{ic|grub.cfg}} is absolutely fine, it is recommended that beginners automatically generate one:<br />
<br />
{{Tip|To automatically search for other operating systems on your computer, install {{Pkg|os-prober}} ({{ic|pacman -S os-prober}}) before running the next command.}}<br />
<br />
# grub-mkconfig -o /boot/grub/grub.cfg<br />
<br />
For more information on configuring and using GRUB, see [[GRUB]].<br />
<br />
==== For UEFI motherboards ====<br />
<br />
For UEFI systems, several options are available. A complete list of options is available at [[UEFI Bootloaders]]. You may find that some options work while others do not. Otherwise, choose one as per your convenience. Here, we give two of the possibilities as examples:<br />
* Boot the Linux kernel directly using [[UEFI Bootloaders#Linux Kernel EFISTUB|EFISTUB]].<br />
* [[gummiboot]] is a simple boot manager, useful if you are dual booting. [[UEFI Bootloaders#Using rEFInd|rEFInd]] is another alternative.<br />
* GRUB is a more complete bootloader, usefull if you run into problems with the other two options.<br />
<br />
{{Note|For UEFI boot, the drive needs to be GPT-partitioned and an [[Unified Extensible Firmware Interface#EFI System Partition|UEFI System Partition]] (512 MiB or larger, type {{ic|EF00}}, formatted with FAT32) must be present. For the following examples, this partition must be mounted on {{ic|/boot}}. If you have followed this guide from the beginning, you have already done all of these.}}<br />
<br />
{{Note|<!--This troubleshooting note should be transferred to [[UEFI Bootloaders]]-->If you run into problems, such as not being able to boot after the bootloader has been installed without any visible error. In this case, you will instead have to enter the UEFI shell and manually add an entry to the UEFI boot menu with the {{ic|bcfg}} command, as described [[Unified Extensible Firmware Interface#bcfg|here]].<br />
* On some ASUS motherboards, there is an EFI bug that always reports {{ic|MaxVariableSize&#61;0}}. Combined with a recent kernel that enforces checks on this value, this prevents {{ic|efibootmgr}} from setting new EFI variables. These motherboards do not support the UEFI Shell v2, so you cannot use the {{ic|bcfg}} method either. To work around this, add {{ic|efi_no_storage_paranoia}} to the kernel command line. You can do this by pressing "e" at the bootloader menu.<br />
* On some UEFI motherboards like the Intel Z77 boards, adding entries with efibootmgr or bcfg from efi shell will not work because they don't show up on the boot menu list after being added to NVRAM.<br />
<br />
:To solve this you have to trick the UEFI firmware that Windows boot manager is present on the ESP partition.<br />
<br />
:Copy the bootx64.efi file from USB drive as bootmgfw.efi efi file to your ESP partition by booting into EFI shell and typing:<br />
<br />
FS1:<br />
cd EFI<br />
mkdir Microsoft<br />
cd Microsoft<br />
mkdir Boot<br />
cp FS0:\EFI\BOOT\bootx64.efi FS1:\EFI\Microsoft\Boot\bootmgfw.efi<br />
<br />
:After reboot, any entries added to NVRAM should show up in the boot menu.<br />
}}<br />
<br />
===== EFISTUB =====<br />
<br />
Install the {{Pkg|efibootmgr}} package and then add an Arch Linux boot entry, replacing {{ic|/dev/sdaX}} with your root partition, usually {{ic|/dev/sda2}}:<br />
<br />
# pacman -S efibootmgr<br />
# efibootmgr -c -L "Arch Linux" -l /vmlinuz-linux -u "root='''/dev/sdaX''' ro initrd=/initramfs-linux.img"<br />
<br />
===== Gummiboot =====<br />
<br />
Install the {{Pkg|gummiboot}} package and then run {{ic|gummiboot install}} to install the boot manager:<br />
<br />
# pacman -S gummiboot<br />
# gummiboot install<br />
<br />
{{Warning|1=<br />
You will probably see an error during gummiboot install, when it fails to add itself to NVRAM because of a [https://bugs.archlinux.org/task/34292 bug]. If you get this error message, manually use efibootmgr to add gummiboot to NVRAM:<br />
{{bc|# efibootmgr -c -L "Gummiboot" -l /EFI/gummiboot/gummibootx64.efi}}<br />
}}<br />
<br />
You will need to manually create a configuration file to add an entry for Arch Linux to the gummiboot manager. Create {{ic|/boot/loader/entries/arch.conf}} and add the following contents, replacing {{ic|/dev/sdaX}} with your root partition, usually {{ic|/dev/sda2}}:<br />
<br />
{{hc|# nano /boot/loader/entries/arch.conf|2=<br />
title Arch Linux<br />
linux /vmlinuz-linux<br />
initrd /initramfs-linux.img<br />
options root='''/dev/sdaX''' ro<br />
}}<br />
<br />
For more information on configuring and using gummiboot, see [[gummiboot]].<br />
<br />
===== GRUB =====<br />
<br />
Install the {{Pkg|grub}} and {{Pkg|efibootmgr}} packages and then run {{ic|grub-install}} to install the bootloader:<br />
<br />
# pacman -S grub efibootmgr<br />
# grub-install --efi-directory=/boot --bootloader-id=arch_grub --recheck<br />
<br />
Next, while using a manually created {{ic|grub.cfg}} is absolutely fine, it is recommended that beginners automatically generate one:<br />
<br />
{{Tip|To automatically search for other operating systems on your computer, install {{Pkg|os-prober}} ({{ic|pacman -S os-prober}}) before running the next command.}}<br />
<br />
# grub-mkconfig -o /boot/grub/grub.cfg<br />
<br />
For more information on configuring and using GRUB, see [[GRUB]].<br />
<br />
=== Unmount the partitions and reboot ===<br />
<br />
Exit from the chroot environment:<br />
<br />
# exit<br />
<br />
Since the partitions are mounted under {{ic|/mnt}}, we use the following command to unmount them:<br />
<br />
# umount /mnt/{boot,home,}<br />
<br />
Reboot the computer:<br />
<br />
# reboot<br />
<br />
{{Tip|Be sure to remove the installation media, otherwise you will boot back into it.}}<br />
<noinclude>{{Beginners' Guide navigation}}</noinclude></div>Mauriciocahttps://wiki.archlinux.org/index.php?title=Fstab&diff=268380Fstab2013-07-27T19:24:51Z<p>Mauricioca: /* Field definitions */</p>
<hr />
<div>{{Lowercase title}}<br />
[[Category:File systems]]<br />
[[Category:Boot process]]<br />
[[ar:Fstab]]<br />
[[es:Fstab]]<br />
[[it:Fstab]]<br />
[[ja:Fstab]]<br />
[[ro:Fstab]]<br />
[[ru:Fstab]]<br />
[[zh-CN:Fstab]]<br />
[[zh-TW:Fstab]]<br />
{{Article summary start}}<br />
{{Article summary text|This article explains how to configure and use fstab.}}<br />
{{Article summary heading|Related}}<br />
{{Article summary wiki|Persistent block device naming}}<br />
{{Article summary wiki|NTFS Write Support}}<br />
{{Article summary wiki|Firefox Ramdisk}}<br />
{{Article summary wiki|Boot Debugging}}<br />
{{Article summary wiki|udev}}<br />
{{Article summary end}}<br />
<br />
The [[Wikipedia:Fstab|/etc/fstab]] file contains static filesystem information. It defines how storage devices and partitions are to be mounted and integrated into the overall system. It is read by the {{ic|mount}} command to determine which options to use when mounting a specific device or partition.<br />
<br />
== File example ==<br />
<br />
A simple {{ic|/etc/fstab}}, using kernel name descriptors:<br />
<br />
{{hc|/etc/fstab|<br />
# <file system> <dir> <type> <options> <dump> <pass><br />
/dev/sda1 / ext4 defaults,noatime 0 1<br />
/dev/sda2 none swap defaults 0 0<br />
/dev/sda3 /home ext4 defaults,noatime 0 2}}<br />
<br />
== Field definitions ==<br />
<br />
The {{ic|/etc/fstab}} file contains the following fields separated by a space or tab:<br />
<br />
<file system> <dir> <type> <options> <dump> <pass><br />
<br />
* '''<file system>''' - the partition or storage device to be mounted.<br />
* '''<dir>''' - the mountpoint where <file system> is mounted to.<br />
* '''<type>''' - the file system type of the partition or storage device to be mounted. Many different file systems are supported: {{ic|ext2}}, {{ic|ext3}}, {{ic|ext4}}, {{ic|btrfs}}, {{ic|reiserfs}}, {{ic|xfs}}, {{ic|jfs}}, {{ic|smbfs}}, {{ic|iso9660}}, {{ic|vfat}}, {{ic|ntfs}}, {{ic|swap}} and {{ic|auto}}. The {{ic|auto}} type lets the mount command guess what type of file system is used. This is useful for optical media (CD/DVD).<br />
* '''<options>''' - mount options of the filesystem to be used. Note that some [http://linux.die.net/man/8/mount mount options] are filesystem specific. Some of the most common options are:<br />
<br />
:* {{ic|auto}} - Mount automatically at boot, or when the command {{ic|mount -a}} is issued.<br />
:* {{ic|noauto}} - Mount only when you tell it to.<br />
:* {{ic|exec}} - Allow execution of binaries on the filesystem.<br />
:* {{ic|noexec}} - Disallow execution of binaries on the filesystem.<br />
:* {{ic|ro}} - Mount the filesystem read-only.<br />
:* {{ic|rw}} - Mount the filesystem read-write.<br />
:* {{ic|user}} - Allow any user to mount the filesystem. This automatically implies {{ic|noexec}}, {{ic|nosuid}}, {{ic|nodev}}, unless overridden.<br />
:* {{ic|users}} - Allow any user in the users group to mount the filesystem.<br />
:* {{ic|nouser}} - Allow only root to mount the filesystem.<br />
:* {{ic|owner}} - Allow the owner of device to mount.<br />
:* {{ic|sync}} - I/O should be done synchronously.<br />
:* {{ic|async}} - I/O should be done asynchronously.<br />
:* {{ic|dev}} - Interpret block special devices on the filesystem.<br />
:* {{ic|nodev}} - Don't interpret block special devices on the filesystem.<br />
:* {{ic|suid}} - Allow the operation of suid, and sgid bits. They are mostly used to allow users on a computer system to execute binary executables with temporarily elevated privileges in order to perform a specific task.<br />
:* {{ic|nosuid}} - Block the operation of suid, and sgid bits.<br />
:* {{ic|noatime}} - Don't update inode access times on the filesystem. Can help performance (see [[#atime_options|atime options]]).<br />
:* {{ic|nodiratime}} - Do not update directory inode access times on the filesystem. Can help performance (see [[#atime_options|atime options]]).<br />
:* {{ic|relatime}} - Update inode access times relative to modify or change time. Access time is only updated if the previous access time was earlier than the current modify or change time. (Similar to noatime, but doesn't break mutt or other applications that need to know if a file has been read since the last time it was modified.) Can help performance (see [[fstab#atime_options|atime options]]).<br />
:* {{ic|flush}} - The {{ic|vfat}} option to flush data more often, thus making copy dialogs or progress bars to stay up until all data is written.<br />
:* {{ic|defaults}} - the default mount options for the filesystem to be used. The default options for {{ic|ext4}} are: {{ic|rw}}, {{ic|suid}}, {{ic|dev}}, {{ic|exec}}, {{ic|auto}}, {{ic|nouser}}, {{ic|async}}.<br />
<br />
* '''<dump>''' - used by the dump utility to decide when to make a backup. Dump checks the entry and uses the number to decide if a file system should be backed up. Possible entries are 0 and 1. If 0, dump will ignore the file system; if 1, dump will make a backup. Most users will not have dump installed, so they should put 0 for the <dump> entry.<br />
<br />
* '''<pass>''' - used by [[fsck]] to decide which order filesystems are to be checked. Possible entries are 0, 1 and 2. The root file system should have the highest priority 1 (unless its type is [[btrfs]], in which case this field should be 0) - all other file systems you want to have checked should have a 2. File systems with a value 0 will not be checked by the fsck utility.<br />
<br />
== Identifying filesystems ==<br />
<br />
There are three ways to identify a partition or storage device in {{ic|/etc/fstab}}: by its kernel name descriptor, label or UUID. The advantage of using UUIDs or labels is that they are not dependent on the order in which the drives are (physically) connected to the machine. This is useful if the storage device order in the BIOS is changed, or if you switch the storage device cabling. Also, the BIOS may occasionally change the order of storage devices. Read more about this in the [[Persistent block device naming]] article.<br />
<br />
To list basic information about the partitions, run:<br />
<br />
{{hc|$ lsblk -f|<br />
NAME FSTYPE LABEL UUID MOUNTPOINT<br />
sda <br />
├─sda1 ext4 Arch_Linux 978e3e81-8048-4ae1-8a06-aa727458e8ff /<br />
├─sda2 ntfs Windows 6C1093E61093B594 <br />
└─sda3 ext4 Storage f838b24e-3a66-4d02-86f4-a2e73e454336 /media/Storage<br />
sdb <br />
├─sdb1 ntfs Games 9E68F00568EFD9D3 <br />
└─sdb2 ext4 Backup 14d50a6c-e083-42f2-b9c4-bc8bae38d274 /media/Backup<br />
sdc <br />
└─sdc1 vfat Camera 47FA-4071 /media/Camera}}<br />
<br />
=== Kernel name ===<br />
<br />
Run {{ic|lsblk -f}} to list the partitions, and prefix them with {{ic|/dev}}.<br />
<br />
See the [[#File_example|example]].<br />
<br />
=== Label ===<br />
<br />
{{Note|Each label should be unique, to prevent any possible conflicts.}}<br />
<br />
For detailed information on how to label a device or partition, see [[Persistent block device naming#by-label]]. Renaming the root partition has to be done from a "live" Linux distribution because the partition needs to be unmounted first.<br />
<br />
Run {{ic|lsblk -f}} to list the partitions, and prefix them with {{ic|1=LABEL=}} :<br />
<br />
{{hc|/etc/fstab|2=<br />
# <file system> <dir> <type> <options> <dump> <pass> <br />
LABEL=Arch_Linux / ext4 defaults,noatime 0 1<br />
LABEL=Arch_Swap none swap defaults 0 0}}<br />
<br />
=== UUID ===<br />
<br />
All partitions and devices have a unique UUID. They are generated by filesystem utilities (e.g. {{ic|mkfs.*}}) when you create or format a partition.<br />
<br />
Run {{ic|lsblk -f}} to list the partitions, and prefix them with {{ic|1=UUID=}} :<br />
<br />
{{Tip|If you would like to return just the UUID of a specific partition:<br />
$ lsblk -no UUID /dev/sda2<br />
}}<br />
<br />
{{hc|/etc/fstab|2=<br />
# <file system> <dir> <type> <options> <dump> <pass><br />
UUID=24f28fc6-717e-4bcd-a5f7-32b959024e26 / ext4 defaults,noatime 0 1<br />
UUID=03ec5dd3-45c0-4f95-a363-61ff321a09ff /home ext4 defaults,noatime 0 2<br />
UUID=4209c845-f495-4c43-8a03-5363dd433153 none swap defaults 0 0}}<br />
<br />
== Tips and tricks ==<br />
<br />
=== Swap UUID ===<br />
<br />
In case your swap partition doesn't have an UUID, you can add it manually. This happens when the UUID of the swap is not shown with the {{ic|lsblk -f}} command. Here are some steps to assign a UUID to your swap:<br />
<br />
Identify the swap partition:<br />
<br />
# swapon -s<br />
<br />
Disable the swap:<br />
<br />
# swapoff /dev/sda7<br />
<br />
Recreate the swap with a new UUID assigned to it:<br />
<br />
# mkswap -U random /dev/sda7<br />
<br />
Activate the swap:<br />
<br />
# swapon /dev/sda7<br />
<br />
=== Filepath spaces ===<br />
<br />
If any mountpoint contains spaces, use the escape character {{ic|\}} followed by the 3 digit octal code {{ic|040}} to emulate them:<br />
<br />
{{hc|/etc/fstab|2=<br />
UUID=47FA-4071 /home/username/Camera<font color="grey">\040</font>Pictures vfat defaults,noatime 0 0<br />
/dev/sda7 /media/100<font color="grey">\040</font>GB<font color="grey">\040</font>(Storage) ext4 defaults,noatime,user 0 2}}<br />
<br />
=== External devices ===<br />
<br />
External devices that are to be mounted when present but ignored if absent may require the {{ic|nofail}} option. This prevents errors being reported at boot.<br />
<br />
{{hc|/etc/fstab|<br />
/dev/sdg1 /media/backup jfs defaults,nofail 0 2}}<br />
<br />
=== atime options ===<br />
<br />
The use of {{ic|noatime}}, {{ic|nodiratime}} or {{ic|relatime}} can improve drive performance. Linux by default uses {{ic|atime}}, which keeps a record (writes to the drive) every time it reads anything. This is more purposeful when Linux is used for servers; it doesn't have much value for desktop use. The worst thing about the default {{ic|atime}} option is that even reading a file from the page cache (reading from memory instead of the drive) will still result in a write! Using the {{ic|noatime}} option fully disables writing file access times to the drive every time you read a file. This works well for almost all applications, except for a rare few like [[Mutt]] that need the such information. For mutt, you should only use the {{ic|relatime}} option. Using the {{ic|relatime}} option enables the writing of file access times only when the file is being modified (unlike {{ic|noatime}} where the file access time will never be changed and will be older than the modification time). The {{ic|nodiratime}} option disables the writing of file access times only for directories while other files still get access times written. The best compromise might be the use of {{ic|relatime}} in which case programs like [[Mutt]] will continue to work, but you'll still have a performance boost because files will not get access times updated unless they are modified.<br />
<br />
{{Note|{{ic|noatime}} already includes {{ic|nodiratime}}. You do not need to specify both.[http://lwn.net/Articles/244941/ ]}}<br />
<br />
=== tmpfs ===<br />
<br />
[[Wikipedia:Tmpfs|tmpfs]] is a temporary filesystem that resides in memory and/or your swap partition(s), depending on how much you fill it up. Mounting directories as tmpfs can be an effective way of speeding up accesses to their files, or to ensure that their contents are automatically cleared upon reboot.<br />
<br />
Some directories where tmpfs is commonly used are [http://www.pathname.com/fhs/2.2/fhs-3.15.html /tmp], [http://www.pathname.com/fhs/2.2/fhs-5.9.html /var/lock] and [http://www.pathname.com/fhs/2.2/fhs-5.13.html /var/run]. Do NOT use it on [http://www.pathname.com/fhs/2.2/fhs-5.15.html /var/tmp], because that folder is meant for temporary files that are preserved across reboots. Arch uses a tmpfs {{ic|/run}} directory, with {{ic|/var/run}} and {{ic|/var/lock}} simply existing as symlinks for compatibility. It is also used for {{ic|/tmp}} in the default {{ic|/etc/fstab}}.<br />
<br />
{{Note|When using [[systemd]], temporary files in tmpfs directories can be recreated at boot by using [[Systemd#Temporary_files|tmpfiles.d]].}}<br />
<br />
By default, a tmpfs partition has its maximum size set to half your total RAM, but this can be customized. Note that the actual memory/swap consumption depends on how much you fill it up, as tmpfs partitions do not consume any memory until it is actually needed.<br />
<br />
To use tmpfs for {{ic|/tmp}}, add this line to {{ic|/etc/fstab}}:<br />
<br />
{{hc|/etc/fstab|<br />
tmpfs /tmp tmpfs nodev,nosuid 0 0}}<br />
<br />
You may or may not want to specify the size here, but you should leave the {{ic|mode}} option alone in these cases to ensure that they have the correct permissions (1777). In the example above, {{ic|/tmp}} will be set to use up to half of your total RAM. To explicitly set a maximum size, use the {{ic|size}} mount option:<br />
<br />
{{hc|/etc/fstab|2=<br />
tmpfs /tmp tmpfs nodev,nosuid,size=2G 0 0}}<br />
<br />
Here is a more advanced example showing how to add tmpfs mounts for users. This is useful for websites, mysql tmp files, {{ic|~/.vim/}}, and more. It's important to try and get the ideal mount options for what you are trying to accomplish. The goal is to have as secure settings as possible to prevent abuse. Limiting the size, and specifying uid and gid + mode is very secure. For more information on this subject, follow the links listed in the [[#See also]] section.<br />
<br />
{{hc|/etc/fstab|2=<br />
tmpfs /www/cache tmpfs rw,size=1G,nr_inodes=5k,noexec,nodev,nosuid,uid=648,gid=648,mode=1700 0 0}}<br />
<br />
See the {{ic|mount}} command man page for more information. One useful mount option in the man page is the {{ic|default}} option. At least understand that.<br />
<br />
Reboot for the changes to take effect. Note that although it may be tempting to simply run {{ic|mount -a}} to make the changes effective immediately, this will make any files currently residing in these directories inaccessible (this is especially problematic for running programs with lockfiles, for example). However, if all of them are empty, it should be safe to run {{ic|mount -a}} instead of rebooting (or mount them individually).<br />
<br />
After applying changes, you may want to verify that they took effect by looking at {{ic|/proc/mounts}} and using {{ic|findmnt}}:<br />
<br />
{{hc|$ findmnt --target /tmp|<br />
TARGET SOURCE FSTYPE OPTIONS<br />
/tmp tmpfs tmpfs rw,nosuid,nodev,relatime}}<br />
<br />
==== Usage ====<br />
<br />
Generally, I/O intensive tasks and programs that run frequent read/write operations can benefit from using a tmpfs folder. Some applications can even receive a substantial gain by offloading some (or all) of their data onto the shared memory. For example, [[Firefox_Ramdisk|relocating the Firefox profile into RAM]] shows a significant improvement in performance.<br />
<br />
===== Improving compile times =====<br />
<br />
{{Note|The tmpfs folder ({{ic|/tmp}}, in this case) needs to be mounted without {{ic|noexec}}, else it will prevent build scripts or utilities from being executed. Also, as stated [[#tmpfs|above]], the default size is half of the available RAM so you may run out of space.}}<br />
<br />
You can run [[makepkg]] with a tmpfs folder for the build directory (which is also a setting in {{ic|/etc/makepkg.conf}}):<br />
<br />
$ BUILDDIR=/tmp/makepkg makepkg<br />
<br />
=== Writing to FAT32 as Normal User ===<br />
<br />
To write on a FAT32 partition, you must make a few changes to your {{ic|/etc/fstab}} file.<br />
<br />
{{hc|/etc/fstab|2=<br />
/dev/sdxY /mnt/some_folder vfat user,rw,umask=000 0 0}}<br />
<br />
The {{ic|user}} flag means that any user (even non-root) can mount and unmount the partition {{ic|/dev/sdX}}. {{ic|rw}} gives read-write access; <br />
{{ic|umask}} option removes selected rights - for example {{ic|1=umask=111}} remove executable rights. The problem is that this entry removes executable rights from directories too, so we must correct it by {{ic|1=dmask=000}}. See also [[Umask]].<br />
<br />
Without these options, all files will be executable. You can use the option {{ic|showexec}} instead of the umask and dmask options, which shows all Windows executables (com, exe, bat) in executable colours.<br />
<br />
For example, if your FAT32 partition is on {{ic|/dev/sda9}}, and you wish to mount it to {{ic|/mnt/fat32}}, then you would use:<br />
<br />
{{hc|/etc/fstab|2=<br />
/dev/sda9 /mnt/fat32 vfat user,rw,umask=111,dmask=000 0 0}}<br />
<br />
=== Remounting the root partition ===<br />
<br />
If for some reason the root partition has been improperly mounted read only, remount the root partition with read-write access with the following command:<br />
<br />
# mount -o remount,rw /<br />
<br />
== See also ==<br />
<br />
*[http://www.kernel.org/pub/linux/docs/lanana/device-list/devices-2.6.txt Full device listing including block device]<br />
*[http://www.pathname.com/fhs/2.2/index.html Filesystem Hierarchy Standard]<br />
*[http://www.askapache.com/web-hosting/super-speed-secrets.html 30x Faster Web-Site Speed] (Detailed tmpfs)</div>Mauricioca