NAME

       systemd-debug-generator - Generator for enabling a runtime debug shell and masking specific units at boot

SYNOPSIS

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

DESCRIPTION

       systemd-debug-generator is a generator that reads the kernel command line and understands three options:

       If the systemd.mask= or rd.systemd.mask= option is specified and followed by a unit name, this unit is
       masked for the runtime (i.e. for this session — from boot to shutdown), similarly to the effect of
       systemctl(1)'s mask command. This is useful to boot with certain units removed from the initial boot
       transaction for debugging system startup. May be specified more than once.  rd.systemd.mask= is honored
       only by initial RAM disk (initrd) while systemd.mask= is honored only in the main system.

       If the systemd.wants= or rd.systemd.wants= option is specified and followed by a unit name, a start job
       for this unit is added to the initial transaction. This is useful to start one or more additional units
       at boot. May be specified more than once.  rd.systemd.wants= is honored only by initial RAM disk (initrd)
       while systemd.wants= is honored only in the main system.

       If the systemd.debug_shell or rd.systemd.debug_shell option is specified, the debug shell service
       "debug-shell.service" is pulled into the boot transaction and a debug shell will be spawned during early
       boot. By default, /dev/tty9 is used, but a specific tty can also be set, either with or without the /dev/
       prefix. Note that the shell may also be turned on persistently by enabling it with systemctl(1)'s enable
       command.  rd.systemd.debug_shell= is honored only by initial RAM disk (initrd) while systemd.debug_shell
       is honored only in the main system.

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

SEE ALSO

       systemd(1), systemctl(1), kernel-command-line(7)

systemd 255                                                                           SYSTEMD-DEBUG-GENERATOR(8)