cron vs systemd timers

cron vs systemd timers
cron is muscle memory — * * * * * and go. But it's silent when a job dies, overlapping runs pile up, and there's no built-in logging.
systemd timers log to journald, won't overlap (one service unit), and survive a missed window with Persistent=true.
— One-line job you'll never touch: cron
— Anything that must not overlap or must catch up after downtime: timer
Backups and cache warmers go on timers here. cron for the trivial stuff. Try it tonight.