[SWLUG] Crontab difficulties

Toby Maxwell-Lyte Toby.Maxwell-Lyte at eazyweb.net
Mon Jan 10 16:15:42 UTC 2005


A quick google found the following page 
http://usertools.plus.net/tutorials/id/1

>From this I reckon you could try
*/1 * * * * /command/to/execute

since the following does it for every 5 minutes.
*/5 * * * * /command/to/execute

Toby

On 10 Jan 2005 at 16:06, Terry John wrote:

> >On 21 Dec 2004, at 21:12, Neil Jones wrote:
> 
> >>
> >> I am trying to get a program to run every minute using crontab.
> >> using
> 
> >> crontab -e I have set up the following.
> >>
> >> * * * * * /programpath etc.
> >>
> >> The program simply waits a random number of extra seconds and saves
> >> the time before the wait and after to a file.
> >>
> >> Running it from the command line. It works.
> >> However nothing seems to happen from the crontab.
> 
> >Tried getting it to write to a log file?
> 
> >* * * * * /programpath >>/home/nat/log.1 2>>/home/nat/log.2
> 
> >You can see what error messages might be appearing then.
> >Could be path related.
> >nat,
> 
> 
> I'm guessing "random no of seconds" is how often cron is ready to do a
> job. The correct entry should be something like
> 
> 1,2,3,4,5,6,7,8,9,10,11,12(etc) * * * * /programpath etc
> 
> I'm not sure if there is a short-form way of writing it.
> I've looked at man cron and in there is says that cron checks the
> crontab file every minute to see if there are changes. That is not the
> same as the first "*" which says at all times.
> 
> Terry
> 
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