Here are some extra cron options you might find handy. You will need vixie-cron for these I think.
- @reboot
- Run once, at startup
- @yearly
- Run once a year, "0 0 1 1 *"
- @annually
- Same as yearly
- @monthly
- Run once a month, "0 0 1 * *"
- @weekly
- Run once a week, "0 0 * * 0"
- @daily
- Run once a day, "0 0 * * *"
- @midnight
- Same as daily
- @hourly
- Run once an hour, "0 * * * *"
The @reboot option is handy for starting up things like Fetchmail at boot time.