Manual: systemd-update-done

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

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 259.5										      SYSTEMD-UPDATE-DONE.SERVICE(8)