crontab in AIX


 
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Operating Systems AIX crontab in AIX
# 1  
Old 11-14-2006
crontab in AIX

Hi all, i am trying to reduce the file size of /var/adm/wtmp in my AIX servers and im using the method cp /dev/null /var/adm/wtmp to reduce it. I thought of automating it by including this command into crontab. Surprisingly, it doesn't work once i put into crontab, there is no error message thrown out, no messages, no output in fact it seems as though that command was not executed at all. How come? I tried typing manually the command and it works it only doesn't work in crontab. Any suggestion?
# 2  
Old 11-14-2006
Please give an example of the entry from the crontab. I bet it is because you are not using the absolute path of cp as in /usr/bin/cp.
# 3  
Old 11-14-2006
I tried with full path and it doesnt work too. By the way the command i use is:

1 * * * * /usr/bin/cp /dev/null /var/adm/wtmp

THe reason i let it run every minute is because at this moment i want to monitor hence a 1 minute wait is the most appropriate.
# 4  
Old 11-14-2006
No wonder /usr/bin/cp /dev/null > /var/adm/wtmp
# 5  
Old 11-14-2006
I am wrong now disregard my last entry!
# 6  
Old 11-14-2006
Try /usr/bin/cat /dev/null > /var/adm/wtmp
# 7  
Old 11-14-2006
How come i need to add the > but via command line i do not need to use that? How often will it update the log file for cron? Once i've modified i do not see it in the /var/adm/cron/log file immediately. It still doesn't work after i did that:

1 * * * * /usr/bin/cp /dev/null > /var/adm/wtmp
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