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Old 08-08-2008, 05:30 AM   #1
ankitsagwekar
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Question can not run cron


i m nood last week install rhel 5.2
i want to know how to use crontab so i do this
crontab -e (from root )

type
Quote:
5 * * * * date
but i not get display of date after 5min

Last edited by ankitsagwekar; 08-08-2008 at 05:31 AM.
 
Old 08-08-2008, 05:57 AM   #2
colucix
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Where do you expect it is displayed? Crontab does not allocate a pseudo-terminal and all the standard output and standard error is sent to the system mail by default, unless you explicitly redirect them to a file (or to /dev/null). Check the root's mail: most likely you have tons of mails with the standard output from the cron jobs.
 
Old 08-08-2008, 06:02 AM   #3
unSpawn
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Quote:
Originally Posted by ankitsagwekar View Post
i want to know how to use crontab so i do this crontab -e (from root )
And if you want to test out stuff, next time please use your personal unprivileged account for that, unless you know the test requires root rights.
 
Old 08-08-2008, 06:27 AM   #4
arava_sandeep
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Angry problem cron not working

Quote:
Originally Posted by ankitsagwekar View Post
i m nood last week install rhel 5.2
i want to know how to use crontab so i do this
crontab -e (from root )

type

but i not get display of date after 5min
hi
i got ur problem
that ur testing cron
u may miss chkconfig crond on and service crond restart
if still problem verfy the ancron
 
Old 08-08-2008, 07:10 AM   #5
ankitsagwekar
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i check root mail by typing

Quote:
tail /var/spool/mail/root
but not found any mail ?

i also try
Quote:
2 * * * * date > /date

Last edited by ankitsagwekar; 08-08-2008 at 07:28 AM.
 
Old 08-08-2008, 07:26 AM   #6
colucix
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The correct way to look at mail would be simply
Code:
mail
being logged as root in your case. Anyway, have you tried to redirect the output of the date command to a file, to test if crontab works? Is the cron daemon running?
 
Old 08-08-2008, 07:44 AM   #7
ankitsagwekar
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Quote:
Originally Posted by colucix View Post
have you tried to redirect the output of the date command to a file, to test if crontab works? Is the cron daemon running?
yes look my second quote on second post
 
Old 08-09-2008, 03:43 PM   #8
colucix
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I re-read your first post and I noticed that you stated
Quote:
but i not get display of date after 5min
well... with your crontab entry most likely you don't get the output after 5 minutes, but at 5 minutes of the next hours, for example at 6:05, 7:05, 8:05 and so on. If you really want to run the cron job every 5 minutes you can use the syntax
Code:
*/5 * * * * date
This is the same as specifying all the 5 minutes steps: 0,5,10,15,20,25,30,35,40,45,50,55. Maybe this is what you were looking for. See man 5 crontab for future reference.
 
Old 08-09-2008, 08:23 PM   #9
chrism01
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Here's a more user-friendly guide: http://www.adminschoice.com/docs/cro...Crontab%20file
 
Old 08-11-2008, 02:27 AM   #10
ankitsagwekar
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thanks

thanks dude u solve my problem

thread is closed now
 
  


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