# systemd-debug-generator(8) - man - phpMan

[SYSTEMD-DEBUG-GENERATOR(8)](https://www.chedong.com/phpMan.php/man/SYSTEMD-DEBUG-GENERATOR/8/markdown)             systemd-debug-generator            [SYSTEMD-DEBUG-GENERATOR(8)](https://www.chedong.com/phpMan.php/man/SYSTEMD-DEBUG-GENERATOR/8/markdown)



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

## SYNOPSIS
       /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, similar to the effect of [**systemctl**(1)](https://www.chedong.com/phpMan.php/man/systemctl/1/markdown)'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)](https://www.chedong.com/phpMan.php/man/systemctl/1/markdown)'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)](https://www.chedong.com/phpMan.php/man/systemd.generator/7/markdown).

## SEE ALSO
       [**systemd**(1)](https://www.chedong.com/phpMan.php/man/systemd/1/markdown), [**systemctl**(1)](https://www.chedong.com/phpMan.php/man/systemctl/1/markdown), [**kernel-command-line**(7)](https://www.chedong.com/phpMan.php/man/kernel-command-line/7/markdown)



systemd 249                                                               [SYSTEMD-DEBUG-GENERATOR(8)](https://www.chedong.com/phpMan.php/man/SYSTEMD-DEBUG-GENERATOR/8/markdown)