docs: modify docs for automated backup to append to SYSTEMD_WANTS rather than overwrite

fixes #8641
In the example, setting SYSTEMD_WANTS instead of appending may prevent
other autostart services attached by earlier udev rules from launching.
This commit changes = to += to fix this behavior.
This commit is contained in:
jan 2025-01-19 14:41:52 +01:00
parent 96305856e7
commit de9d46acf0

View file

@ -34,7 +34,7 @@ Find out the ID of the partition table of your backup disk (here assumed to be /
Then, create ``/etc/backups/80-backup.rules`` with the following content (all on one line)::
ACTION=="add", SUBSYSTEM=="block", ENV{ID_PART_TABLE_UUID}=="<the PTUUID you just noted>", TAG+="systemd", ENV{SYSTEMD_WANTS}="automatic-backup.service"
ACTION=="add", SUBSYSTEM=="block", ENV{ID_PART_TABLE_UUID}=="<the PTUUID you just noted>", TAG+="systemd", ENV{SYSTEMD_WANTS}+="automatic-backup.service"
The "systemd" tag in conjunction with the SYSTEMD_WANTS environment variable has systemd
launch the "automatic-backup" service, which we will create next, as the