systemd-getty-generator - Generator for enabling getty instances on the console
/lib/systemd/system-generators/systemd-getty-generator
systemd-getty-generator is a generator that automatically
instantiates serial-getty@.service on the kernel console(s), 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
kernel-parameters.txt[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].
Container Interface
kernel-parameters.txt
https://www.kernel.org/doc/Documentation/admin-guide/kernel-parameters.txt
systemd for Administrators, Part XVI: Gettys on Serial Consoles (and Elsewhere)