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Error while running a script through cron job

 
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Top Forums UNIX for Dummies Questions & Answers Error while running a script through cron job
# 1  
Old 03-17-2014
Error while running a script through cron job
Hi Team,

When i am running the below query manually it is giving me the right output
i.e.
Code:
export PATH=/usr/sbin:/usr/bin:/sbin:/bin:$PATH
ADMIN=abc@abc.com
CPU_HIGH=`sar|awk '{print $9}'|sort -n|head -5|sed -n 5p`
CPU_MAX=`echo "scale=3; 100-$CPU_HIGH" | bc`
CPU_LOW=`sar|awk '{print $9}'|sort -n|tail -1`
CPU_MIN=`echo "scale=3; 100-$CPU_LOW" | bc`
MEM_MAX=`cat /root/admin_files/server_monitor/datewise_monitor/ram_monitor-$(date +"%d-%B-%Y")|awk '{print $2'}|sort -n|tail -1`
MEM_MIN=`cat /root/admin_files/server_monitor/datewise_monitor/ram_monitor-$(date +"%d-%B-%Y")|awk '{print $2'}|sort -n|head -1`
now=`date +-%Y-%m-%d-%H:%M:%S`
file=utilization_$now.log
filename=/root/admin_files/server_monitor/datewise_monitor/$file
echo "$(date): Memory Utilization Report for server $(hostname) is" >>$filename
echo "-----------------------------------" >>$filename
echo "                                   " >>$filename
echo "CPU Max Utilization :  $CPU_MAX %  " >>$filename
echo "CPU Min Utilization  :  $CPU_MIN % " >>$filename
echo "                                   " >>$filename
echo "Max Ram Utilization :  $MEM_MAX %  " >>$filename
echo "Min Ram Utilization  :  $MEM_MIN % " >>$filename
cat $filename| mail -s "$(date +"%d-%B-%Y"): CPU & Memory Summarization Report for server $(hostname) : "$(ifconfig eth0 | sed -n '/inet /{s/.*addr://;s/ .*//;p}')" " $ADMIN
sar >> /root/admin_files/server_monitor/datewise_monitor/cpu_monitor$(date +"-%d-%B-%Y").txt
sar -r >>/root/admin_files/server_monitor/datewise_monitor/memory_monitor$(date +"-%d-%B-%Y").txt

Output:

Code:
Mon Mar 17 14:47:28 GMT 2014: Memory Utilization Report for server mmv0pfecdel0070 is
  -----------------------------------
                                     
  CPU Max Utilization :  7.29 %  
  CPU Min Utilization  :  .07 % 
                                     
  Max Ram Utilization :  12.000 %  
  Min Ram Utilization  :  11.800 %

But when i am running the script through cronjob it is giving me the below output:

Code:
 Mon Mar 17 15:02:01 GMT 2014: Memory Utilization Report for server mmv0pfecdel0070 is
  -----------------------------------
                                     
  CPU Max Utilization :   %  
  CPU Min Utilization  :   % 
                                     
  Max Ram Utilization :  12.000 %  
  Min Ram Utilization  :  11.800 %

Please assist me in this.

Moderator's Comments:
Mod Comment edit by bakunin: please use the CODE-tags which i inserted for you this time yourself from now on, as required by the rules. Thank you.
Last edited by bakunin; 03-17-2014 at 12:46 PM..
# 2  
Old 03-17-2014
This seems to be an - albeit hidden - case of Cron Problem Number One. I suppose "sar" is not in the PATH, because all the other utilities you used are, as far as i could see.

Btw., it doesn't help you to add the old PATH:
Code:
export PATH=/usr/sbin:/usr/bin:/sbin:/bin:$PATH

because "$PATH" is empty when a cron-script starts.

I hope this helps.

bakunin
# 3  
Old 03-17-2014
Even after adding the sar path in the export does not resolve the issue. I have removed $PATH from the end.

Still getting the same error. Please assist.

This is the entry in the cron tab

41 15 * * * /root/admin_files/server_monitor/server_monitor.sh
# 4  
Old 03-17-2014
What OS?
# 5  
Old 03-17-2014
Please set the xtrace option at the top of the script and post the execution log.
# 6  
Old 03-17-2014
Hi have added the option

set -o xtrace.

But i am still getting the same output.
# 7  
Old 03-17-2014
Instead of defining PATH, I would suggest using absolute path for all utilities located other than under /bin
Code:
CPU_MAX=`echo "scale=3; 100-$CPU_HIGH" | /usr/bin/bc`

This is just an example, you have to find the absolute path for each utilities using which command and replace.
 
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