systemd-update-done.service, systemd-update-done — Mark /etc/
and /var/
fully updated
systemd-update-done.service
/usr/lib/systemd/systemd-update-done
systemd-update-done.service
is a
service that is invoked as part of the first boot after the vendor
operating system resources in /usr/
have been
updated. This is useful to implement offline updates of
/usr/
which might require updates to
/etc/
or /var/
on the
following boot.
systemd-update-done.service
updates the
file modification time (mtime) of the stamp files
/etc/.updated
and
/var/.updated
to the modification time of the
/usr/
directory, unless the stamp files are
already newer.
Services that shall run after offline upgrades of
/usr/
should order themselves before
systemd-update-done.service
, and use the
ConditionNeedsUpdate=
(see
systemd.unit(5))
condition to make sure to run when /etc/
or
/var/
are older than /usr/
according to the modification times of the files described above.
This requires that updates to /usr/
are always
followed by an update of the modification time of
/usr/
, for example by invoking
touch(1)
on it.
Note that if the systemd.condition_needs_update=
kernel command line option is
used it overrides the ConditionNeedsUpdate=
unit condition checks. In that case
systemd-update-done.service
will not reset the condition state until a follow-up
reboot where the kernel switch is not specified anymore.