Cron is not working...

[praveen..]

Hi,
I am able to execute 1 script using #./tmp/script.sh

and can get the desired output on my email.

I want to run this script in every 15 minutes so i made some entries in crontab file

# crontab -e
00,15,30,45 * * * * /tmp/script.sh

But now i am not getting any mail
# ps -ef | grep -i cron
root 3348 1 0 Nov30 ? 00:00:00 crond
root 31075 23905 0 02:34 pts/7 00:00:00 grep -i cron
#

Please suggest

[praveen..]

Now I tried with...

* * * * * date > /tmp/cron.test

in crontab file


and it is working fine...


Please suggest

[George Liu_4]

1. add
MAILTO=
to explicitly assign the mail user;

2.
check /var/log/crontab to see your cronjobs had been invoked

[George Liu_4]

correct on my last post.
it should be
/var/log/cron

[Stuart Browne]

Does '/tmp/script.sh' rely upon a given PATH being set?

Generally, only a bare-minimum of PATH is set in the cron environment.

Basically, you've got two choices:

1) Make sure the path you require is set within the script.

2) Absolutely-path every command you call.

[praveen..]

#tail -10 /var/log/cron
Dec 15 02:50:01 hostname crond[11336]: (root) CMD (/opt/wlserver/ldm1v4.sh)

I am getting this message on every minutes.

/opt/wlserver/ldm1v4.sh is the script which i am trying to execute using cron.


where i need to add "MAILTO"?

I think path is set because if i give this command..
#/opt/wlserver/ldm1v4.sh

then script is successfully executing.

please suggest
thanks

[Stuart Browne]

If you're getting that message every minute, then you're executing that script every minute.

As this isn't "/tmp/script.sh", I don't see how that's relevant.

Now, back to the PATH issue. Executing a command from the command line *IS NOT THE SAME* as having it execute from cron.

The PATH environment variable is different. STDIN, STDOUT and STDERR are different when executed from cron. Lots of things are different when executed from cron.

[Alpha977]

hello!

i think the syntax is incorrect.
Try first with a classical command, without comma, example:
10 4 1 * * /tmp/script.sh

Then, check if you have cron.allow file.

Bye

[Atul Gautam]

Praveen,

Alpha is correct.

The syntax that you have used in the crontab file is incorrect.

The format which Alpha has also mentioned will be ---

15 * * * *
Then restart your crond service and then see if it gets executed or not.....

Also you can check your cron jobs using crontab -l command





Atul

[Stuart Browne]

Alpha, Atul, you're both wrong.

There's nothing wrong with a comma-delimited set of minute values. Go back and re-read your man pages.

Also, if using 'crontab -e', the '/etc/crontab' file or '/etc/cron.d/' structure, there's no need to restart 'crond'.

[praveen..]

so please let me know how to ser PATH environment variable


Thanks

[Stuart Browne]

2nd line of your script:

PATH="/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin"

that sort of thing.

Do 'echo $PATH' in the shell to get what it's currently set to.. copy/paste that in.

[praveen..]

I have set the PATH in my script,
but still that script is not running using cron.

if i execute this script using #./script.sh
, I am getting the correct output.

when i am using cron....even I am not getting any thing in /var/log/maillog

(This script send me the output to my email id)

Please suggest

[Stuart Browne]

What's the first line of the script file?

[praveen..]

This script is for to find a process "ldm1v4" whether it is running or not?

if the process is not running, script will send the email. (mailfile is a script to send the emails)

# cat ldm1v4.sh

PATH="/home/db2home/SymphonyRPM/Server/Python23:/home/db2home/SymphonyRPM/Share:/home/db2home/SymphonyRPM/Server/ldap:/home/db2home/SymphonyRPM/Server/stubs::/home/db2home/SymphonyRPM/server:/home/db2home/SymphonyRPM/server/Python23:/home/db2home/SymphonyRPM/share:/home/db2home/SymphonyRPM/server/ldap:/home/db2home/SymphonyRPM/Server/stubs::/usr/local/nz/bin:/opt/CA/SharedComponents/dmscript/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin"
NUM_PROC=$(ps -ef |grep -c ldm1v4)
if [[ $NUM_PROC = 1 ]]
then
/opt/wlserver/mailfile_ldm1v4.sh praveen@hp.com root@hostname.company.com 1 2 `hostname`::wlserver process is running
fi



and I also tried with #!/bin/sh

# cat ldm1v4.sh
#!/bin/sh
PATH="/home/db2home/SymphonyRPM/Server/Python23:/home/db2home/SymphonyRPM/Share:/home/db2home/SymphonyRPM/Server/ldap:/home/db2home/SymphonyRPM/Server/stubs::/home/db2home/SymphonyRPM/server:/home/db2home/SymphonyRPM/server/Python23:/home/db2home/SymphonyRPM/share:/home/db2home/SymphonyRPM/server/ldap:/home/db2home/SymphonyRPM/Server/stubs::/usr/local/nz/bin:/opt/CA/SharedComponents/dmscript/bin:/usr/kerberos/sbin:/usr/kerberos/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/root/bin"
NUM_PROC=$(ps -ef |grep -c ldm1v4)
if [[ $NUM_PROC = 1 ]]
then
/opt/wlserver/mailfile_ldm1v4.sh praveen@hp.com root@hostname.company.com 1 2 `hostname`::wlserver process is running
fi



If i give the command...
#./ldm1v4.sh

I got the desired result
this script is not working with cron

Please suggest

[Stuart Browne · Accepted solution]

That should be working.

Check the messages file for any cron errors, restart crond, ensure that 'crontab -l' shows the right stuff, that the file is actually there and is executeable (+x), that the security policy allows for it to execute outside of a shell (audit.log possibly)...

Time to grasp at straws.

[George Liu_4]

At this time, I hope your cronjob works fine.
BUt If it is not, follow the steps below:

1. in file /var/log/cron, check your script/cronjob has been started

2. If not, check your crontab syntax

3. If yes, append ">>& /tmp/cron.log" on the problematic entry of your crontab, and add some debug info in your script

What's your shell? is it bash or csh? The path setting is different.

[praveen..]

I needed to use...if [[ $NUM_PROC == 1 ]]
while I was using ...if [[ $NUM_PROC = 1 ]]
in my script..


Thanks everybody :-)