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Home > Archive > Unix questions > December 2005 > Cron Job - Scheduling Query
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Cron Job - Scheduling Query
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| Hi,
I need to schedule a cron job (AIX) which runs every 10 minutes (like
9:10, 9:20, 9:30, etc) except at midnight. What would be the syntax for
this?
Thanks.
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| Bit Twister 2005-12-29, 8:52 pm |
| On 29 Dec 2005 15:46:44 -0800, raghu wrote:
> Hi,
>
> I need to schedule a cron job (AIX) which runs every 10 minutes (like
> 9:10, 9:20, 9:30, etc) except at midnight. What would be the syntax for
> this?
What does a
man 5 crontab
show?
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| Barry Margolin 2005-12-29, 8:52 pm |
| In article <1135900004.213995.277820@g49g2000cwa.googlegroups.com>,
"raghu" <raghu_vnin@yahoo.com> wrote:
> Hi,
>
> I need to schedule a cron job (AIX) which runs every 10 minutes (like
> 9:10, 9:20, 9:30, etc) except at midnight. What would be the syntax for
> this?
The standard syntax is:
0,10,20,30,40,50 1-23 * * * <command line>
10,20,30,40,50 0 * * * <command line>
It's necessary to split it into two lines to avoid midnight; another way
to do that would be to have the command check whether it's midnight when
it starts, and just exit. Then you can combine the lines into one:
0,10,20,30,40,50 * * * * <command line>
With many recent versions of cron you can replace the list of minutes on
the first line with */10, which means every 10 minutes. Check your man
page to see whether your version supports this.
--
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***
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