[SWLUG] Crontab difficulties

[Terry John]

Found a good guide :-)

man 5 crontab

0-59 * * * * /programpath

Should work ok

terry

-----Original Message-----
From: discuss-bounces at swlug.org.uk [mailto:discuss-bounces at swlug.org.uk]
On Behalf Of Terry John
Sent: 10 January 2005 16:06
To: nat; discuss at swlug.org.uk
Subject: RE: [SWLUG] Crontab difficulties


>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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