NAME

       systemd-update-done.service, systemd-update-done - Mark /etc/ and /var/ fully updated

SYNOPSIS

       systemd-update-done.service

       /usr/lib/systemd/systemd-update-done

DESCRIPTION

       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.

SEE ALSO

       systemd(1), systemd.unit(5), touch(1)