Crontab tricks

[Shawn Badger]

I always end up referring back to the web when I do a cron job because
once I do them I rarely ever have to go back. I end up forgetting the
order of the fields and yes I do us ally use the 5 fields instead of
the @something because of compatibility problems. The only @something
I use on any sort of regular basis is the the @reboot as an easy way
to start something as a non-root user that doesn't warrant its own
start up script. I hope this helps.



On 5/15/07, Dan Lund <situationalawareness at gmail.com> wrote:
> Its just better to learn the 5 field syntax anyway, because its
> standard across unices.
>
>
>
> On 5/15/07, Dazed_75 <lthielster at gmail.com> wrote:
> > That gives a less terse explanation of crontab for anyone who needs one.  I
> > was not looking for help, but offering some to people who did not understand
> > cron.  I believe I was correct in how to use these shortcuts though I never
> > have used them.  Back in the day when I did such things I always used the 5
> > field syntax.
> >
> > On 5/15/07, Shawn Badger <badger.shawn at gmail.com> wrote:
> > >
> > > Does this help?
> > >
> > >
> > > http://en.wikipedia.org/wiki/Crontab
> > >
> > >
> > >
> > > On 5/15/07, Dazed_75 <lthielster at gmail.com> wrote:
> > > > For the noobs like me who were not exactly sure how to use this tidbit,
> > > you
> > > > can get a better description from "man 5 crontab".  For example, you can
> > > use
> > > > "@yearly" in place of the first 5 fields (0 0 1 1 *) in a crontab entry
> > > to
> > > > make a more humanly readable entry.
> > > >
> > > >
> > > > On 5/11/07, Shawn Badger <badger.shawn at gmail.com> wrote:
> > > > >
> > > > > 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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> > > >
> > > > --
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> > > matter
> > > > and those who matter don't mind.  - Dr. Seuss
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> > --
> > Be who you are and say what you feel, because those who mind don't matter
> > and those who matter don't mind.  - Dr. Seuss
> >
>
>
> --
> "Courage is like love; it must have hope to nourish it."
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