hi

my cron script is in /root/Scripts/NTP

vim /root/Scripts/NTP
ntpdate 172.17.124.15 >> /root/Scripts/ntp.log
----------------------------------------------------
crontab entries
*/2 * * * * sh /root/Scripts/NTP
----------------------------------------------------
tailf /var/log/cron | grep NTP
Mar 28 11:52:01 CPCAPP101 crond[9427]: (root) CMD (sh /root/Scripts/NTP)
Mar 28 11:54:01 CPCAPP101 crond[9442]: (root) CMD (sh /root/Scripts/NTP)
----------------------------------------------------

when i run the script as "sh /root/Scripts/NTP" then it runs perfectly
but in cron it some how doesn't work. "tailf /var/log/cron | grep NTP" shows cron job is been executed but in " /root/Scripts/ntp.log" i don't see the logs but when i run the script separately i get logs in "/root/Scripts/ntp.log"

Script is perfect & other cron jobs are working fine.
Only this particular script is giving problem.

The only thing that comes to mind is permissions. cron is a bit fussy about what the exact permissions are. I've been bitten by this problem where something will run manually as a script but won't run in a cron context. Have you checked to make sure that NTP has the same permissions as the other scripts that do run successfully in cron have?
cheers,
jdk

hi

this are the permissions & they are same

-rwxr-xr-x 1 root root 933 Mar 5 16:23 Graph
-rwxr-xr-x 1 root root 904 Mar 2 17:11 IO_Graph
-rwxr-xr-x 1 root root 292 Mar 2 17:12 Mem
-rwxr-xr-x 1 root root 94 Mar 28 10:57 NTP
-rwxr-xr-x 1 root root 756 Mar 28 12:12 ntp.log

Hi Maxy,
Hmmmmm. I just solved a problem with a script that I put in /etc/cron.hour. Since my isp changes the ip of the router regularly and I hate laptops I need to use ssh to access my system whenever I travel. So I needed a way of checking regularly to see if my routers ip had changed recently and if so then run a ddclient script to update my dynamic dns site. Just like your case, it didn't work from cron but if I ran the script manually it would work. Then I RTFM-ed the cron man page and found my script, called whatismyip.sh contained a full-stop (".") in the file name which is not allowed by cron. I removed the full-stop and now the script runs perfectly every hour and only runs the ddclient script when my router's ip has actually changed.

All this to say, your log file has a full-stop in the filename. It seems that should be ok but what if you changed the file name to ntp_log just to make sure that is not the problem.
cheers,
jdk

try
Cron needs the whole path.