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

crontab entry

subodhbagade — Tue, 19 Aug 2008 15:31:47 GMT

Hello expert,

I have one of the backup script whose crontab entry is missing. back up is updating every day on particular file system.
Script is:---------

#!/bin/ksh
cd /db_backup
nohup compress *.1
nohup compress *.2
echo "compression complete" > compit
find . -mtime -7 -mtime +1 > delit
find ohr* -mtime -1 > copyit
for i in `cat copyit`
do
nohup cp $i /ignite-backup/backups/db_backup
done
for i in `cat delit`
do
rm $i
done

As per the crontab i am making this entry ,please comment on this .

min hr date month dayofweek cmd
0 18 1,15 * 1-5 /ignite-backup/backups/db_backup

Re: crontab entry

James R. Ferguson — Tue, 19 Aug 2008 15:37:26 GMT

Hi:

I presume that you want a comment about the crontab scheduling:

Your command will run every Monday through Friday (inclusive) *including* the 1st and the 15th of every ("*") month t 1800.

See the 'crontab' manpages.

Regards!

...JRF...

Re: crontab entry

piyush mathiya — Tue, 19 Aug 2008 15:38:13 GMT

Hi subodh,
It seems that it will run on every 1st and 15th of the month if there is mon-fri, otherwise it will not run, it will run at evening 6 o'clock if first condition match. . .

Regards,
Piyush Mathiya

Re: crontab entry

SKR_1 — Tue, 19 Aug 2008 17:08:05 GMT

Please provide your exact requirement. When you exactly want to run this script, specify the time date and days as well when you need to execute this script.

Your crontab entry is not proper. I am not understanding why u have specify 1-5.

Thanks

SKR

Re: crontab entry

Dennis Handly — Wed, 20 Aug 2008 05:35:54 GMT

What do you expect to do with those nohups scattered in your script? This isn't going to help because the next step may be aborted.
Also, since the script is started from cron, there won't be any hangup signals.

Note your last for-loop can be replaced by:
rm $(< delit)
And similarly the other:
nohup cp $(< copyit) /ignite-backup/backups/db_backup