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

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | COLOPHON

SYSTEMD-DEBUG-GENERATOR(8) systemd-debug-generatorSYSTEMD-DEBUG-GENERATOR(8)

NAME         top

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

SYNOPSIS         top

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

DESCRIPTION         top

       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, similar
       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         top

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

COLOPHON         top

       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 2020-08-13.  (At that
       time, the date of the most recent commit that was found in the repos‐
       itory was 2020-08-11.)  If you discover any rendering problems in
       this HTML version of the page, or you believe there is a better or
       more up-to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not part
       of the original manual page), send a mail to man-pages@man7.org

systemd 246                                       SYSTEMD-DEBUG-GENERATOR(8)

Pages that refer to this page: 30-systemd-environment-d-generator(7)kernel-command-line(7)systemd.directives(7)systemd.generator(7)systemd.index(7)