How to use cron vs systemd timers

Short answer

Cron is simple and universal; systemd timers offer better logging, dependencies, and fine-grained control.

Key differences

• Cron: Simple time-based scheduling; email output; limited dependencies.
• Systemd timers: Integrated logging via journal; can depend on other units; more complex setup.

When to use each

• Cron: Simple periodic scripts, legacy systems, quick setup.
• Systemd timers: Services needing startup dependencies, complex scheduling, or detailed logging.

Tips

• Migrate incrementally; cron jobs can call systemd services.
• Use Persistent=true in timers to catch up on missed runs.
• Both can coexist; choose based on complexity and monitoring needs.