Using systemd services as a cron replacement

1. systemd-as-cron.md

Create service file:

sudo EDITOR=nvim systemctl edit --force --full my-cron-service.service

Create timer file:

sudo EDITOR=nvim systemctl edit --force --full my-cron-service.timer

Enable the newly created timer:

sudo systemctl enable --now my-cron-service.timer

2. .service

[Unit]
Description=Example service

[Service]
Type=oneshot
ExecStart=echo example service

3. .timer

[Unit]
Description=Example service

[Timer]
OnCalendar=*-*-* 04:00:00
RandomizedDelaySec=3600
Persistent=true

[Install]
WantedBy=timers.target