systemd-getty-generator(8) — Linux manual page

SYSTEMD-...GENERATOR(8)  systemd-getty-generator SYSTEMD-...GENERATOR(8)

NAME

       systemd-getty-generator - Generator for enabling getty instances
       on the console

SYNOPSIS

       /usr/lib/systemd/system-generators/systemd-getty-generator

DESCRIPTION

       systemd-getty-generator is a generator that automatically
       instantiates serial-getty@.service on the kernel consoles, if
       they can function as ttys and are not provided by the virtual
       console subsystem. It will also instantiate serial-getty@.service
       instances for virtualizer consoles, if execution in a virtualized
       environment is detected. If execution in a container environment
       is detected, it will instead enable console-getty.service for
       /dev/console, and container-getty@.service instances for
       additional container pseudo TTYs as requested by the container
       manager (see Container Interface[1]). This should ensure that the
       user is shown a login prompt at the right place, regardless of
       which environment the system is started in. For example, it is
       sufficient to redirect the kernel console with a kernel command
       line argument such as console= to get both kernel messages and a
       getty prompt on a serial TTY. See The kernel's command-line
       parameters[2] for more information on the console= kernel
       parameter.

       systemd-getty-generator implements systemd.generator(7).

       Further information about configuration of gettys can be found in
       systemd for Administrators, Part XVI: Gettys on Serial Consoles
       (and Elsewhere)[3].

KERNEL COMMAND LINE

       systemd-getty-generator understands the following
       kernel-command-line(7) parameters:

       systemd.getty_auto=
           this options take an optional boolean argument, and default
           to yes. The generator is enabled by default, and a false
           value may be used to disable it.

           Added in version 250.

ENVIRONMENT

       $SYSTEMD_GETTY_AUTO
           This variable takes an optional boolean argument, and default
           to yes. The generator is enabled by default, and a false
           value may be used to disable it.

           Added in version 250.

SYSTEM CREDENTIALS

       getty.ttys.serial, getty.ttys.container
           These system credentials may be used to spawn additional
           login prompts on selected TTYs. The two credentials should
           contain a newline-separated list of TTY names to spawn
           instances of serial-getty@.service (in case of
           getty.ttys.serial) and container-getty@.service (in case of
           getty.ttys.container) on.

           Added in version 254.

SEE ALSO

       systemd(1), kernel-command-line(7),
       systemd.system-credentials(7), agetty(8)

NOTES

        1. Container
               Interface
           https://systemd.io/CONTAINER_INTERFACE

        2. The kernel's command-line parameters
           https://docs.kernel.org/admin-guide/kernel-parameters.html

        3. systemd for Administrators, Part XVI: Gettys on Serial
           Consoles (and Elsewhere)
           https://0pointer.de/blog/projects/serial-console.html

COLOPHON

       This page is part of the systemd (systemd system and service
       manager) project.  Information about the project can be found at
       ⟨http://www.freedesktop.org/wiki/Software/systemd⟩.  If you have
       a bug report for this manual page, see
       ⟨http://www.freedesktop.org/wiki/Software/systemd/#bugreports⟩.
       This page was obtained from the project's upstream Git repository
       ⟨https://github.com/systemd/systemd.git⟩ on 2024-06-14.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2024-06-13.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
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       (which is not part of the original manual page), send a mail to
       man-pages@man7.org

systemd 257~devel                                SYSTEMD-...GENERATOR(8)

Pages that refer to this page: kernel-command-line(7), systemd.directives(7), systemd.generator(7), systemd.index(7), systemd.system-credentials(7)

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