setting a cron job

James Gray james.gray at dot.com.au
Mon Mar 10 01:13:28 UTC 2008


On Mon, 10 Mar 2008 12:01:33 pm Jamie Griffin wrote:
> ok... I've managed to edit the file successfully but now it doesn't seem to
> run. I've added the line:
>
> 2 * * * * * /usr/bin/getmail
>
> to the file but it's not fetching mail, or doesn't appear to be. Does it
> look as though there's something wrong with what i've done?

That will run at 2 minutes past the hour, every hour.  Check /var/log/syslog 
to see information about crond's operation.  If you wanted to run a command 
at more regular intervals you can separate the values with commas or use a 
divisor:

*/15 * * * * * /some/command

and

0,15,30,45 * * * * * /some/command

Both do exactly the same thing :)  If you want to run a command every 5 
minutes put "*/5" in the first column, asterisks in the remaining time 
definition columns, then the command you want to run.

HTH,

James
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