Tech/OSS/systemd

• Tech/OSS/systemd/Restart on config change
• Tech/OSS/systemd/Service with config files

Config Precedence

1. /etc/systemd
2. /run/systemd
3. /usr/lib/systemd

Timers

A solution for CRON type work in today times.

See timers with

systemctl list-timers --all

Examples from /usr/lib/systemd/system/

apt-daily-upgrade.timer which calls apt-daily-upgrade.service

systemctl edit apt-daily-upgrade.timer

### Anything between here and the comment below will become the new contents of the file

[Timer]
OnCalendar=*-*-* 3:00

### Lines below this comment will be discarded

Which creates /etc/systemd/system/apt-daily-upgrade.timer.d/override.conf

systemctl list-timers apt-daily-upgrade.timer
NEXT                        LEFT     LAST                        PASSED       UNIT                    ACTIVATES
Mon 2021-04-19 03:38:32 MDT 18h left Sun 2021-04-18 06:45:27 MDT 2h 32min ago apt-daily-upgrade.timer apt-daily-upgrade.service

1 timers listed.
Pass --all to see loaded but inactive timers, too.