crontab query

tushar.jadhav29 · 08-30-2016, 05:33 PM

hi all,

I am little confuse to write the cron job rule.

How can i write the job, should run alternative day midn8 at 12:00

Every month in last date cron job has to run ( where i am observe
month end may come 31, 30,28.so how we can write the rule)

please suggest.

thanks

timl · 08-30-2016, 06:10 PM

Hi,

firstly a couple of tips - please don't use text speak when posting and don't post a supplementary/unrelated question after the first.

Regarding cron: first port of call is to hop into a terminal and type:

Quote:

man cron

or

Quote:

man crontab

If those resources don't answer your questions it is best to try your favourite search engine and enter something like:

Quote:

parameters to run cron on last day of every month

That should throw up plenty of options you can try out

Cheers

tushar.jadhav29 · 08-30-2016, 06:18 PM

Thanks timl,

TenTenths · 08-31-2016, 03:25 AM

Quote:

Originally Posted by tushar.jadhav29

Every month in last date cron job has to run ( where i am observe
month end may come 31, 30,28.so how we can write the rule)

You can't do this kind of rule with cron.

What you can do is schedule your job to run on days 28,29,30,31 and use this test as part of the jobs bash script:

Code:

if [ $(date +%d -d "tomorrow") -ne 1 ] ; then exit 128 ;fi

This will cause your script to exit with errorlevel 128 if it's not the last day of the month or continue if it is the last day of the month.

tushar.jadhav29 · 09-01-2016, 09:47 PM

thanks Ten,

issue have been resolved.