Crontab tricks

Here are some useful crontab tricks that I found a while back on the
web and then someone posted them again. So I though I should pass them
on to the group.

Entry                Description                     Equivalent To
@reboot     Run once, at startup.     None
@yearly      Run once a year     0 0 1 1 *
@annually     (same as @yearly)    0 0 1 1 *
@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)          0 0 * * *
@hourly     Run once an hour        0 * * * *

I found them again at this site:

http://blog.lxpages.com/2007/05/10/neat-crontab-tricks/
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