1. Script
Basic example:
pgrep sshd >/dev/null || echo 'sshd down'2. Cron
Schedule the script every 5 minutes.
3. Logs
Redirect output to /var/log.
4. Verify
Test the script manually.
Quick checklist
[ ] Steps completed
[ ] Config updated
[ ] Service tested
[ ] Restart/rollback ready
[ ] Logs checked