SYSTEMD-UPDATE-DONE.SERVICE(8)			   systemd-update-done.service

NAME
       systemd-update-done.service, systemd-update-done - Mark /etc/ and /var/
       as 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)
       stored in and "on" the files /etc/.updated and /var/.updated to the
       modification time of the /usr/ directory, unless the stamp files are
       already newer. (The timestamp is stored as the mtime field on the file,
       but also in the file to support filesystems that do not store full
       timestamp precision.)

       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.

OPTIONS
       The following options are understood:

       --root=root
	   Takes a directory path as an argument. The program will operate on
	   paths below the specified root directory.

	   Added in version 258.

       -h, --help
	   Print a short help text and exit.

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

systemd 258					SYSTEMD-UPDATE-DONE.SERVICE(8)