topic Re: Crontab Modification Script in Operating System - Linux

Crontab Modification Script

Kyle D. Harris — Tue, 08 Jul 2003 12:32:07 GMT

#This script is to identify if the crontab has been modified and then emails the sys admin of the changes. For some reason i can't get the files created or an email sent when i test it out. I have it to run in the crontab every minute. Can somebody give me ideas?? Thanks! Semper Fi!

crontab -l > /usr/local/apache/htdocs/harris/crontabtext
diff /usr/local/apache/htdocs/harris/crontabtext /usr/local/apache/htdocs/harris/crontabtext.backup > /tmp/crontab_changes
if [ -s /tmp/crontab_changes ] #send mail if file is not empty
then
echo "The Crontab has been changed" | sendmail harriskd@matcom.usmc.mil
cp /usr/local/apache/htdocs/harris/crontabtext /usr/local/apache/htdocs/harris/crontabtext.backup
rm /tmp/crontab_changes
fi

Re: Crontab Modification Script

Jerome Henry — Tue, 08 Jul 2003 12:44:30 GMT

A script should start with :
#!bin/bash
#
in order to let your system know it has to work with shell scripting.
Try adding a line after fi :
what if nothing changes ?
I suggest 'touch test.txt' to debug,
then 'exit 0' for final version.

hth

J

Re: Crontab Modification Script

Kyle D. Harris — Tue, 08 Jul 2003 13:06:26 GMT

Jerome-
Thanks. That seemed to help. I finally got this script to at least run and the files got created when i would change the crontab. The only thing left not working is it sending email to me via sendmail. Is my sendmail line correct? It looks right to me. Thanks for your help. Pts have been rewarded!

Kyle

Re: Crontab Modification Script

Claudio Cilloni — Tue, 08 Jul 2003 13:13:08 GMT

I think you should use the 'mail' command, not 'sendmail'. Just this substitution is enough.

hth
Claudio

Re: Crontab Modification Script

Jerome Henry — Tue, 08 Jul 2003 13:42:54 GMT

Hi Kyle,

tks fr your points !

RE sendmail issue, your line is correct, except that message should follow endmail command :
try /usr/sbin/sendmail harriskd@matcom.usmc.mil <"The Crontab has been changed"
It should work.
Claudio suggestion would also work, as mail command works very well in the pipe option.
Glad your script works !

J