Query regarding cron jobs

[Ankit Mahawar]

Hi Mark

Thanks for inputs ...

The script is getting executed a few times when scheduled through cron

The probability of successful execution is 6/10.

Is SELinux enabled?
SElinux is disabled in my system ..

Are you using complete paths in your script?  Your path in an interactive
shell and the one supplied by cron may be different.

 Path is  from the root dir.


> What is the difference between entries in /etc/cron.d and /etc/crontab
> file .

It is easy for a package to add/remove a file from /etc/cron.d .. a little
harder to edit /etc/crontab

How can we print the entries in /etc/cron.d  through commnad line as it not
showing any entries  crontab -l as the entry in /etc/cron.d is for root
user .

Thanks
Ankit







                                                                                                                                             
  From:       Ankit Mahawar/MUM/TCS                                                                                                          
                                                                                                                                             
  To:         General Red Hat Linux discussion list <redhat-list at redhat.com>                                                                 
                                                                                                                                             
  Date:       09/29/2011 12:46 PM                                                                                                            
                                                                                                                                             
  Subject:    Re: Query regarding cron jobs                                                                                                  
                                                                                                                                             
  Sent by:    Ankit Mahawar                                                                                                                  
                                                                                                                                             




Hi ,

Thanks Barry for your inputs ..

The script is getting executed a few times when scheduled through cron

The probability of successful execution is 6/10.

Is SELinux enabled?
SElinux is disabled in my system ..

Are you using complete paths in your script?  Your path in an interactive
shell and the one supplied by cron may be different.

 Path is  from the root dir.


> What is the difference between entries in /etc/cron.d and /etc/crontab
> file .

It is easy for a package to add/remove a file from /etc/cron.d .. a little
harder to edit /etc/crontab

How can we print the entries in /etc/cron.d  through commnad line as it not
showing any entries  crontab -l as the entry in /etc/cron.d is for root
user .

Thanks
Ankit











                                                                                                                                             
  From:       Barry Brimer <lists at brimer.org>                                                                                                
                                                                                                                                             
  To:         General Red Hat Linux discussion list <redhat-list at redhat.com>                                                                 
                                                                                                                                             
  Date:       09/29/2011 12:25 PM                                                                                                            
                                                                                                                                             
  Subject:    Re: Query regarding cron jobs                                                                                                  
                                                                                                                                             
  Sent by:    redhat-list-bounces at redhat.com                                                                                                 
                                                                                                                                             





> Hi ,
>
> I have a file created in /etc/cron.d which has an entry which execute a
> command at the time interval specified .
>
> But due to some reason it is not getting executed and the entry is still
> there .

I would expect it to be there unless you removed it.  Failure to run
would not cause it to disappear.  What does the cron entry look like?

> I have checked the cron daemon is running
>
> Could you please tell the scenario in which this can happen ?

What do you see in /var/log/cron ?
What are the perms of the script / program you are calling?
Are you using complete paths in your script?  Your path in an interactive
shell and the one supplied by cron may be different.
Is SELinux enabled?
Can you run this script by hand with success?

> What is the difference between entries in /etc/cron.d and /etc/crontab
> file .

It is easy for a package to add/remove a file from /etc/cron.d .. a little
harder to edit /etc/crontab

Barry

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