deb-systemd-helper - subset of systemctl for machines not running systemd
enable | disable | purge | mask | unmask | is-enabled
| was-enabled | debian-installed | update-state | reenable
is a Debian-specific helper script which re-implements
the enable, disable, is-enabled and reenable commands from systemctl.
The "enable" action will only be performed once (when first installing
the package). On the first "enable", an state file is created which
will be deleted upon "purge".
The "mask" action will keep state on whether the service was
enabled/disabled before and will properly return to that state on
The "was-enabled" action is not present in systemctl, but is required
in Debian so that we can figure out whether a service was enabled before we
installed an updated service file. See http://bugs.debian.org/717603 for
The "debian-installed" action is also not present in systemctl. It
returns 0 if the state file of at least one of the given units is present.
The "update-state" action is also not present in systemctl. It updates
's state file, removing obsolete entries (e.g.
service files that are no longer shipped by the package) and adding new
entries (e.g. new service files shipped by the package) without enabling them.
is intended to be used from maintscripts to enable
systemd unit files. It is specifically NOT intended to be used interactively
by users. Instead, users should run systemd and use systemctl, or not bother
about the systemd enabled state in case they are not running systemd.
- If you export _DEB_SYSTEMD_HELPER_DEBUG=1,
deb-systemd-helper will print debug messages to stderr (thus visible in
dpkg runs). Please include these when filing a bugreport.
Michael Stapelberg <firstname.lastname@example.org>