topic Re: crontab entry in Operating System - HP-UX

crontab entry

Sreer — Mon, 07 Feb 2011 12:09:05 GMT

Hello exprts,

I need to make a crontab entry for the below manner.

the reboot of server have to be planned on last Sunday of the month at 1:00 AM

how can it be? me bit confused....

00 01 * * 0 ==> I guess this may not work....

pls advice me whether the above mentioned way will work or not?

Thanks and regards
Sree

Re: crontab entry

Hakki Aydin Ucar — Mon, 07 Feb 2011 12:15:37 GMT

you need to warning broadcast message for event OR you want crontab to make reboot desired date ?

Re: crontab entry

Vidhya B — Mon, 07 Feb 2011 12:24:11 GMT

Hi,
I think it will work for all the sundays in the month.

It will be better if you mention the last seven dates of the month in the third field. But the problem will arise because each month has different number of days.

I think if you schedule thrice as below it will work as far as my knowledge.
00 01 25,26,27,28,29,30,31 Jan,Mar,May,Jul,Aug,Oct,Dec 0

Similarly it will be necessary to do for the month with 30 days and feb.

But I think there might be any other simple method to do this.

Re: crontab entry

Ismail Azad — Mon, 07 Feb 2011 12:29:04 GMT

Hi,

It's been ages since I have used cron. Your syntax looks fine to me... And I assume you know what command or redirection you would put after the numericals.

Crontab manual " If both month and day of month are specified as an asterisk, but day of week is an element or list, then only the specified days of the week match ".

Regards
Ismail Azad

Re: crontab entry

Sreer — Mon, 07 Feb 2011 12:33:00 GMT

Hi Hakki Aydin,

My requirement is only to reboot the server in the mentioned time.
No need for Broadcaste message.

thnx&rgds
Sree

Re: crontab entry

Manix — Thu, 29 Sep 2011 20:50:25 GMT

Some scripts to do the same.

http://h30499.www3.hp.com/t5/General/scheduling-a-cron-job-on-the-last-day-of-the-month/m-p/3099819#M80696

http://h30499.www3.hp.com/t5/Languages-and-Scripting/scripting-cron-job/m-p/3681868/highlight/true#M14647

Thanks
Manix

Re: crontab entry

Dennis Handly — Mon, 07 Feb 2011 13:25:04 GMT

Basically crontab can't directly do what you want. The closest you can do is to pick every Sunday and use the scripting ideas in Manix's threads and have them select the proper Sunday.