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wiki/notebook/cli.systemctl.org
Gabriel Arazas 549f476c4c Update the notebook 
The topics I've covered so far for Linux, package managers, archiving,
and learning.

I also updated some formatting for other notes especially with the
command line references.
2021-07-29 23:26:51 +08:00

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Command line: systemctl

The go-to command to manage units in a systemd-ful system.

For full details, you can view the systemctl.1 manual page.

Synopsis 

systemctl [OPTIONS...] COMMAND [COMMAND_ARGS...] [COMMAND_OPTIONS...]

Options

  • --user runs the binary in user mode with the user-specific options and load-path. See systemd at user-level for more details.
  • --help is an obvious one. It prints a detailed help section of the command.

Subcommands

  • enable UNIT and disable UNIT enables and disables units. It mainly adds the unit activation at startup.

    • --now starts/stops the unit. It is the equivalent of systemctl {enable,disable} UNIT && systemctl {start,stop} UNIT. Pretty handy if you intend to add the unit at startup and want to use it now.
  • start UNIT and stop UNIT starts and stops the unit, respectively. Though, this doesn't activate
  • restart UNIT restarts the given unit. This also reloads with the modified changes of the unit.
  • In some cases where restarting the unit isn't enough, daemon-reload will reload the daemon with the modified units. systemd does not have reload-at-change for its unit. That is, if a unit is modified, systemd will not run the modified version until reloaded.
  • show-environment shows the environment variables of the system.
  • list-units [PATTERN...] is self-explanatory ;p.
  • is-active PATTERN... prints the status of the matched unit and exits successfully if it's active.