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Crontab does not kick at the given time

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Top Forums Shell Programming and Scripting Crontab does not kick at the given time
# 1  
Old 11-28-2016
Bug Crontab does not kick at the given time
I have crontab set to be triggered daily @ 8 am and 8:20 am server time.

Code:
00 08 * * * /web/scripts/check.sh
20 08 * * * /web/scripts/check.sh

Code:
uname -a
Linux mymac 3.10.0-327.36.3.el7.x86_64 #1 SMP Thu Oct 20 04:56:07 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux

Code:
ls -ltr /web/scripts/check.sh
-rwxrwxr-x 1 user1 user1 10180 Nov 10 13:41 /web/scripts/check.sh

The check.sh generates a file with the date timestamp using >> (redirection). Running the check.sh manually works fine and i see the updated timestamp.

Can you please let me know why check.sh did not get triggered all these days when i set it to trigger everyday @ 8 am and 8:20 am.
Last edited by mohtashims; 11-28-2016 at 12:21 PM..
# 2  
Old 11-28-2016
The usual problem with cron, common enough it's in the FAQ, is that it runs with a very minimal PATH and because of that occasionally misses common commands. Are you sure all the commands you want are in cron's PATH? Have you tried exporting a complete PATH yourself in script?
# 3  
Old 11-28-2016
You can see in the system logs if and when the scripts were started. Redirect its stderr to a file so you can analyse its behaviour (failure) after it ran.
# 4  
Old 11-28-2016
Quote:
Originally Posted by mohtashims
I have crontab set to be triggered daily @ 8 am and 8:20 am server time.
Code:
00 08 * * * /web/scripts/check.sh
20 08 * * * /web/scripts/check.sh

Code:
uname -a
Linux mymac 3.10.0-327.36.3.el7.x86_64 #1 SMP Thu Oct 20 04:56:07 EDT 2016 x86_64 x86_64 x86_64 GNU/Linux

Code:
ls -ltr /web/scripts/check.sh
-rwxrwxr-x 1 user1 user1 10180 Nov 10 13:41 /web/scripts/check.sh

Can you please let me know why check.sh did not get triggered all these days when i set it to trigger everyday @ 8 am and 8:20 am.
Hello mohtashims,

Could you please try following points and let us know.
i- Try to run your script manually once to make sure it is running correctly.
ii- If first option works fine then go to cron logs /var/log/cron and see there what's happening.

Thanks,
R. Singh
# 5  
Old 11-28-2016
This is most likely caused by what Corona688 said in post#2.

However, I would ask how you put these entries into cron? Did you edit the crontab yourself or did you use the crontab command?

If you edited it yourself then cron may not know that the new entries are there so try restarting the cron daemon.
# 6  
Old 11-28-2016
Quote:
Originally Posted by RudiC
You can see in the system logs if and when the scripts were started. Redirect its stderr to a file so you can analyse its behaviour (failure) after it ran.
Can you give me the command to redirect the STD err?
# 7  
Old 11-28-2016
Code:
exec 2>>/tmp/mycronlogfile

This User Gave Thanks to Corona688 For This Post:
mohtashims
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