Cron question

[dictum9]

How do I cron a script to run every 4 minutes?

[Sundar_7 · Accepted solution]

2 ways to do it

1) You will have to list the minutes explictly in the cron like this

0,4,8,12,16,20.....56 * * * *

2) Control the execution programmatically using a wrapper.

[A. Clay Stephenson]

0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * /xxx/yyy/mytask.sh

[A. Clay Stephenson]

By the way, did you bother to do a "man crontab" before you asked this question. That would tell you that you would do something like this (as well as answer your question):

crontab -l > myfile
edit myfile and make your changes
crontab < myfile

[James R. Ferguson]

Hi:

Look at the manpages for 'crontab' to see that a comma-delimited list is what you want:

# 0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * /etc/mything

...would run /etc/mything every 4-minutes of every hour of every day of every month.

Regards!

...JRF...

[sachit patil]

#crontab -e
make enrty
0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * script.sh

DO this

[Steven E. Protter]

Shalom etc,

Note that Linux has initiated some conventions that Unix does not support. The */4 convention you might find on a Linux support board will generally not work.

SEP

[Arturo Galbiati]

0,4,8,12,16,20,24,28,32,36,40,44,48,52,56 * * * * /full_path/your_script 1>out 2>err

Note that if you not redirect the oupit/error of the script this is send to the user email and you can see it by elm.

HTH,
Art

[Yogeeraj_1]

hi,
see also:
http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=1114824

kind regards
yogeeraj