homelab/active/software_systemd/systemd.md

Systemd

Timers

Basic timer:

my_service.timer

[Unit]
Description=Run $my_service every hour

[Timer]
OnCalendar=hourly
AccuracySec=10min
Persistent=true
Unit=$my_service.service

[Install]
WantedBy=timers.target

my_service.service

[Unit]
Description=Runs some command
After=syslog.target network.target auditd.service
Wants=network-online.target

[Service]
ExecStart=/usr/bin/command -with -arguments

[Install]
WantedBy=multi-user.target

Create an on-the-fly timer (will not survive reboots)

systemd-run --user --on-calendar '*:0/1' /bin/sh -c "date >> ~/log.txt"