Difference between revisions of "Automatic login to virtual console"

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(Use drop-in feature of systemd for getty autologin: added steps and made clearer)
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{{Related articles end}}
 
{{Related articles end}}
  
This article describes how to automatically log in to a ''virtual console'' at the end of the [[boot process]]. This article only covers console log-ins; methods for starting an [[Xorg|X server]] are described in [[Start X at Login]].
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This article describes how to automatically log in to a [[Wikipedia:Virtual console|virtual console]] at the end of the [[boot process]]. This article only covers console log-ins; see [[Start X at Login]] for information about automatic login into [[Xorg]].
  
== Installation ==
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== Configuration ==
=== Use drop-in feature of systemd for getty autologin ===
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[http://cgit.freedesktop.org/systemd/systemd/tree/NEWS#n655 Since systemd 198] unit files may now be extended via drop-in files without having to edit/override the unit files themselves, to learn more about this feature, consult [http://www.freedesktop.org/software/systemd/man/systemd.unit.html systemd.unit(5)] and search for ''Along with a unit file foo.service a directory foo.service.d/ may exist.''
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There are two types of consoles: virtual and serial ones. In most cases you would want to setup up autologin on virtual console, the one which device name is ''ttyN'', where ''N'' is a number. The configuration of the autologin for the serial consoles will be slightly different. Device names of the serial consoles look like ''ttySN'', where ''N'' is a number.
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Configuration relies on systemd [[Systemd#Editing_provided_unit_files|drop-in files]] to override the default parameters passed to ''agetty''.
  
==== Virtual console ====
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The configuration differs for virtual and serial consoles. In most cases you would want to setup up automatic login on virtual console, the one which device name is {{ic|tty''N''}}, where {{ic|''N''}} is a number. The configuration of the automatic login for the serial consoles will be slightly different. Device names of the serial consoles look like {{ic|ttyS''N''}}, where {{ic|''N''}} is a number.
  
Create a new directory named {{ic|getty@tty1.service.d}} under {{ic|/etc/systemd/system}}:
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=== Virtual console ===
  
# mkdir /etc/systemd/system/getty@tty1.service.d
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Create the following file (and the leading directories):
  
Then create a new file named {{ic|autologin.conf}} and add it into the directory:
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{{hc|/etc/systemd/system/getty@tty1.service.d/autologin.conf|2=
 
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[Service]
{{hc|/etc/systemd/system/getty@tty1.service.d/autologin.conf|
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2=[Service]
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ExecStart=
 
ExecStart=
ExecStart=/usr/bin/agetty --autologin <username> --noclear %I 38400 linux
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ExecStart=-/usr/bin/agetty --autologin ''username'' --noclear %I 38400 linux
 
}}
 
}}
  
Then disable getty@.service and enable getty@tty1.service
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{{Tip|The option {{ic|1=Type=idle}} will delay the service startup until all jobs (state change requests to units) are completed. When using {{ic|1=Type=simple}}, the service will be started immediately, but boot-up messages may pollute the login prompt. This option is particularly useful when [[Start X at Login|starting X automatically]]. To use this option, add {{ic|1=Type=simple}} into {{ic|autologin.conf}}.}}
  
{{bc|
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If you want to use other ''tty'' than ''tty1'' see [[Systemd FAQ#Q:_How_do_I_change_the_number_of_gettys_running_by_default.3F|Systemd FAQ]].
systemctl disable getty@.service
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systemctl enable getty@tty1.service
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}}
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==== Serial console ====
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=== Serial console ===
  
# mkdir /etc/systemd/system/serial-getty@ttyS0.service.d
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Create the following file (and the leading directories):
  
The file {{ic|autologin.conf}} will also look slightly different
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{{hc|/etc/systemd/system/serial-getty@ttyS0.service.d/autologin.conf|2=
 
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[Service]
{{hc|/etc/systemd/system/serial-getty@ttyS0.service.d/autologin.conf|
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2=[Service]
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ExecStart=
 
ExecStart=
ExecStart=-/sbin/agetty --autologin <username> -s %I 115200,38400,9600 vt102
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ExecStart=-/sbin/agetty --autologin ''username'' -s %I 115200,38400,9600 vt102
Type=simple
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}}
 
}}
  
=== Tips ===
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==See also==
====Start X at Login====
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[[Start X at Login|starting X automatically]]. By default, {{ic|getty@.service}} uses {{ic|1=Type=idle}}, which delays the execution of agetty until all jobs (state change requests to units) are completed. By using {{ic|1=Type=simple}} {{ic|getty@.service}} will start immediately, but systemd boot-up messages might pollute the login prompt. To enable {{ic|1=Type=simple}} just add a line to {{ic|autologin.conf}}:
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{{hc|/etc/systemd/system/getty@tty1.service.d/autologin.conf|
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* [[Systemd#Change_default_target_to_boot_into|Change default runlevel/target to boot into]]
2=[Service]
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ExecStart=
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ExecStart=-/usr/bin/agetty --autologin <username> --noclear %I 38400 linux
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Type=simple
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}}
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==== Adding ttys ====
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[[Systemd FAQ#Q:_How_do_I_change_the_number_of_gettys_running_by_default.3F|Systemd FAQ]].
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== Tips & Tricks ==
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=== Avoiding unnecessary dmesg errors ===
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To avoid errors related to {{ic|display-manager.service}} in dmesg, you should set the default target to multi-user instead of graphical:
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# systemctl enable multi-user.target
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==See also==
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* [[Systemd#Change_default_target_to_boot_into|Change default runlevel/target to boot into]].
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Revision as of 12:30, 29 December 2013

This article describes how to automatically log in to a virtual console at the end of the boot process. This article only covers console log-ins; see Start X at Login for information about automatic login into Xorg.

Configuration

Configuration relies on systemd drop-in files to override the default parameters passed to agetty.

The configuration differs for virtual and serial consoles. In most cases you would want to setup up automatic login on virtual console, the one which device name is ttyN, where N is a number. The configuration of the automatic login for the serial consoles will be slightly different. Device names of the serial consoles look like ttySN, where N is a number.

Virtual console

Create the following file (and the leading directories):

/etc/systemd/system/getty@tty1.service.d/autologin.conf
[Service]
ExecStart=
ExecStart=-/usr/bin/agetty --autologin username --noclear %I 38400 linux
Tip: The option Type=idle will delay the service startup until all jobs (state change requests to units) are completed. When using Type=simple, the service will be started immediately, but boot-up messages may pollute the login prompt. This option is particularly useful when starting X automatically. To use this option, add Type=simple into autologin.conf.

If you want to use other tty than tty1 see Systemd FAQ.

Serial console

Create the following file (and the leading directories):

/etc/systemd/system/serial-getty@ttyS0.service.d/autologin.conf
[Service]
ExecStart=
ExecStart=-/sbin/agetty --autologin username -s %I 115200,38400,9600 vt102

See also