How to Execute bash script & triggers email

[mohitrohatgi]

Hi friends,

I execute the script as;-
*/5 * * * * script_name
It gives me the wrong o/p.

But when I execute the script thru command line:-
bash script_name
It give me the perfect result.

I have given 777 permissions all throughout to the files this script refers to but still not able to make out what's wrong.
Any idea?

[burschik]

What is "o/p" supposed to mean?

Have you checked that the script itself is executable? Have you checked that the script is in the path used by cron?

[mohitrohatgi]

O/p is output.
well the script I have given 777 permission.
Also, the files it is referring to , i tried them giving 777 as well but still not working.
pls help!

[mohitrohatgi]

pls help ASAP

[lomcevak]

One thing that many people don't realise is that when a script runs in cron the account's profile script is NOT run 1st like it is when you log in. So things like PATH most likely aren't defined as they are in your interactive shell.

Best to change the shebang line to:

#!/bin/bash -vx

to see what is happening.

One of the best things to do to avoid problems is specify the full path for commands you execute.

Instead of:

command <options>

use:

/path/to/command <options>

[mohitrohatgi]

Clear
exec 1> servicecheck_status
echo "This is an Automated Alert !!"
period=`date`
echo "Today is $period"
echo " "

##command to check the service(& re-directing the output to file "u001"):-
service status 2> u001

##logging on to the other server to check the same service with same command:-
ssh server_IP service status 2> u002

result_001=`cat u001`
result_002=`cat u002`

##"re_stored" is the file which it refers to while making decisions
result_stored=`cat re_stored`

if [[ "$result_001" = "$result_stored" && "$result_002" = "$result_stored" ]]
then
echo "The services are STOPPED on both the servers.Please fix it immediately by starting it on any of the servers."
mail -s "Automated Alert for Services" -r servicecheck@mail.com myemailadd.com < servicecheck_status

elif [[ "$result_001" != "$result_stored" && "$result_002" != "$result_stored" ]]
then
echo "The services are RUNNING on both the servers.Please fix it immediately by stopping it on any of the servers."
mail -s "Automated Alert for Services" -r servicecheck@mail.com myemailadd.com < servicecheck_status
else
echo "FINE" > mohit.log
fi
##When everything is fine it will not send the alert but create a file "mohit.log"
================================================== ===
above is the script which I made for checking the services on 2 servers, comparing the alerts & then sending the alerts accordingly.
Now when I run this script like through command line:-
$ bash script_name
It runs perfect;

However when I put it in cron like :-
*/15 * * * * /path/to/script
It does not run as it should.

I tried giving 777 permissions to the script as well the file it refers to ("re_stored") compare the alerts, still it fails.
Now tell me where m I going wrong??
Please HELP!