remove crontab entries

nmete has asked for the wisdom of the Perl Monks concerning the following question:

I could not find any methods in Schedule::Cron to remove one particular entry.
I don't want to remove all entries, (clean_timetable() does so) but after finishing my scheduled job i want to remove the corresponding job. this means I want to run the scheduled job only once.
In unix 'at' command is used, istead of cron, for this purpose.
In perl, Schedule::At module allows to run some unix commands but seems not supporting subroutine calls.
is there any way to subroutine calls with Schedule::At or is there any way to run each entry once with Schedule::Cron?

Comment on remove crontab entries

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Re: remove crontab entries
by Plankton (Vicar) on Jul 22, 2004 at 20:39 UTC

$ crontab -l
5 5 * * * touch cron_ran_`date| tr ' :' '_'`
10 10 * * * doSomethingOrOther
$ crontab -l | grep -v touch | crontab
$ crontab -l
10 10 * * * doSomethingOrOther
[download]

5 5 * * * touch cron_ran_`date| tr ' :' '_'` && crontab -l | grep -v t
+ouch | crontab
10 10 * * * doSomethingOrOther
[download]

Plankton: 1% Evil, 99% Hot Gas.

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Re^2: remove crontab entries

by Jonathan (Curate) on Jul 23, 2004 at 15:08 UTC

Schedule::Cron doesn't use cron - it forks off its own scheduler process therefore touching the crontab file won't affect it. As the poster said there isn't a suitable method to remove an individual job.

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Re: remove crontab entries
by Jonathan (Curate) on Jul 23, 2004 at 15:16 UTC

POE

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Re: remove crontab entries

by nmete (Novice) on Jul 26, 2004 at 20:30 UTC

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Re: remove crontab entries
by Anonymous Monk on Dec 17, 2012 at 15:42 UTC

simple $ crontab -e it will enter you into a nano/pico type file find yout crontab remove it save and then see it it works type $ crontab -l

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