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Top Forums Shell Programming and Scripting Modify crontab file on many hosts... Post 302362333 by Casey on Thursday 15th of October 2009 04:56:33 PM
Old 10-15-2009
Question Modify crontab file on many hosts...

Hi everyone taking a second to read this Smilie,

I need to modify a line from the root crontab file... Usually, if I need to do this I use the crontab -e, which opens up the file with Vi, then I edit it and there's no problem.

Now, I need to do this but on many servers at the same time... Like in 200. I know how to execute the script on them all, but what I'm thinking about is how can I modify these crontab files, since as far as I know it's kinda unhealthy to directly modify them from /var/spool/cron/crontabs/root. So I can't use my sed/awk commands over these files...

My idea is to run the little script from a NIM on all servers.

Any suggestion?


Thanks in advance!!! Smilie


Brian
 

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bcrontab(1)						      General Commands Manual						       bcrontab(1)

NAME
bcrontab - Manage users crontab files SYNOPSIS
bcrontab [ -u user ] file bcrontab [ -u user ] { -l | -r | -e } DESCRIPTION
bcrontab interfaces with the bcron-spool daemon to manage crontab files in the privileged spool directory. OPTIONS
-u user Tell bcron-spool that we are acting on behalf of the named user. bcron-spool will only accept the username if bcrontab is running as either root or the same user ID as the named user. -l List the cronab crontab to standard output. -r Remove the user's crontab. -e Edit the current crontab. ENVIRONMENT
VISUAL If this is set, it is used as the editor to invoke to edit a crontab. EDITOR If $VISUAL is not set and this is, it is used as the editor to invoke to edit a crontab. If neither are set, /bin/vi is used. BCRON_SOCKET The path to the named socket used to communicate with bcron-spool. Defaults to /var/run/bcron-spool. LOGNAME USER These two variables are used, in order, to determine the user name invoking the program. One must be set if the -u option is not used. FILES
bcrontab tries to writes a temporary file into the current directory, and then into /tmp if that fails, in order to edit the current crontab. SEE ALSO
bcron-spool(8), crontab(5) AUTHOR
Bruce Guenter <bruceg@em.ca> bcrontab(1)
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