systemd systemd-getty-generator 8 systemd-getty-generator Generator for enabling getty instances on the console /usr/lib/systemd/system-generators/systemd-getty-generator 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). 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 for more information on the console= kernel parameter. systemd-getty-generator implements systemd.generator7. Further information about configuration of gettys can be found in systemd for Administrators, Part XVI: Gettys on Serial Consoles (and Elsewhere). systemd-getty-generator understands the following kernel-command-line7 parameters: systemd.getty_auto= This kernel command line option may be used to control the execution mode of the generator. Takes an optional boolean argument. Since v258, this also takes comma-separated list of special values: credential, container, console, and builtin. When credential is specified, the two credentials getty.ttys.serial and getty.ttys.container will be parsed. See System Credentials section below for more details. When container is specified, console-getty.service and container-getty@.service will be enabled when the system is running in a container. This option will be ignored when the system is not in a container. When console is specified, serial-getty@.service for active kernel consoles will be enabled. This option will be ignored when the system is running in a container. When builtins is specified, serial-getty@.service for available virtualizer consoles will be enabled. This option will be ignored when the system is running in a container. When yes, the above four options will be enabled. When no, all options are disabled and no service will be enabled. When the kernel command line option is specified without an argument, defaults to yes. The generator is enabled by default, and a false value may be used to disable it. $SYSTEMD_GETTY_AUTO This environment variable may be used to control the execution mode of the generator. Takes the same value as systemd.getty_auto= kernel command line option. getty.auto The system credential may be used to control the execution mode of the generator. Takes the same value as systemd.getty_auto= kernel command line option. 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. Any lines starting with a # will be ignored. systemd1 kernel-command-line7 systemd.system-credentials7 agetty8