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Modify hour crontab UNIX

 
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# 1  
Old 11-27-2013
IBM Modify hour crontab UNIX
Hello,

I wish to modify the day of launch of a "batch" in the crontab on several servers with awk or sed.
Can you help me ?

Beforehand thank you

Code:
00 18 * * 1 /box/Pra/bin/systeme_reverse.ksh -s >/dev/null 2>&1

# 2  
Old 11-27-2013
Code:
00  18  *  * 1 /box/Pra/bin/systeme_reverse.ksh -s >/dev/null 2>&1

Day of week = 0 == Sunday 1== Monday .... 6 = Saturday. 1,3 == Monday and Wednesday, so, 1 == Monday.

* == means any value.


If you want an exact setting verified please tell us what you want.
http://en.wikipedia.org/wiki/Cron

Your crontab example runs every Monday at 1800 (6pm). To change the hour change 18 to 12, to move from 6pm to noon.
Last edited by jim mcnamara; 11-27-2013 at 09:14 AM..
# 3  
Old 11-27-2013
I have to modify many entries in crontab for this line.
I would like to change the day with a script shell by ssh command with a awk or sed command.

Thank you for your response
Last edited by jim mcnamara; 11-27-2013 at 09:28 AM..
# 4  
Old 11-27-2013
And you believe that modifying the line, will suffice for cron to update? What OS are you using?
# 5  
Old 11-27-2013
Just saw your IBM icone so:
I appended to my crontab in /var/spool/cron/crontabs (as root...)
Code:
#   monitor activity and mail if issues
00,15,30,45  *  *  *  *  /sm/cron/bin/monit_sys >/sm/cron/log/monit_sys.log 2>&1
# ==========================================================================
36 15 * * *  /home/vbe/test_cron_cmd > /home/vbe/cron.log 2>/home/vbe/cron.err
na12:/home/vbe $ date
Wed Nov 27 15:35:47 CET 2013
na12:/home/vbe $ date
Wed Nov 27 15:35:53 CET 2013
na12:/home/vbe $ date
Wed Nov 27 15:35:57 CET 2013
na12:/home/vbe $ r ll
ll cron.*
-rw-r--r--    1 vbe      bin              74 Nov 27 15:30 cron.err
-rw-r--r--    1 vbe      bin              12 Nov 27 15:30 cron.log
-rw-r--r--    1 vbe      bin              14 Nov 27 15:30 cron.out
na12:/home/vbe $ date
Wed Nov 27 15:36:04 CET 2013
na12:/home/vbe $ r ll
ll cron.*
-rw-r--r--    1 vbe      bin              74 Nov 27 15:30 cron.err
-rw-r--r--    1 vbe      bin              12 Nov 27 15:30 cron.log
-rw-r--r--    1 vbe      bin              14 Nov 27 15:30 cron.out
na12:/home/vbe $ oslevel
7.1.0.0

For the rest if you have so many changes the easiest would be to remove the line and append...
# 6  
Old 11-27-2013
Hi,
I have oslevel AIX 6.1.
I just want to change the day of the script in crontab file for 60 servers with ssh

Thank you
# 7  
Old 11-28-2013
Where exactly do you have a problem? The sed-script? The way cron works? The ssh-communication?

I still don't understand what exactly you need to be helped with, please elaborate.

I hope this helps.

bakunin
 
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