Hi guys,

Got this problem here....
I have this piece of application installed on my *nix machine.
And the application actually has its own command to check its status.
The command are already in ENV variable.

So, I wrote a script sometime ago that incorporate the application command and put it into the crontab.
This script is supposed to be executed hourly and will send out email.

However, I notice some problem with the script.
Whenever I executed it manually, my script executed and display the app's status with no prob.
But when scheduled with cron, the display for the app's status alway goes missing.

Sample of the code:

echo "Application's Status" >> /tmp/out
appCheck >> /tmp/output #appCheck is the app's command

echo "Disk Usage" >> /tmp/out
df -k >> /tmp/output


Anybody got any idea what went wrong?!

Thanks in advance

The PATH env variable of cron is very short. It contains only this: /usr/bin:/bin .

So always use the absolute path to the program that you use in your scripts.

Ha.... thanks for enlightening me... I got what u mean

For security, you should always use fully-qualified pathnames to the executables you use (eg, "/bin/grep", not just "grep") , to avoid people spoofing them by putting replacements earlier in your path.

thanks for the advice

Btw, I have encountered another problem.

I am able to execute some of the application native commands.
But notice that some of them actually need the additional modules (from the application /lib path) in order to execute the command properly.

How can i actually reflect in my script so that the application native commands know
where to find the needed module without problem while executed via crontab?


Below is actually some examples of the error i captured:
exec(): 0509-036 Cannot load program /myApp/bin/app_listing
because of the following errors: 0509-150 Dependent module libqcnt.so could not be loaded.

0509-022 Cannot load module libqcnt.so. 0509-026 System error:
A file or directory in the path name does not exist.

Can you set a LIBPATH (or whatever it's called these day - LD_LIBPATH?) in the beginning of your script? Check your environment and see if the path to the libraries is setup somewhere, and replicate it in the script.