03-04-2009
comment out a cron job as part of a script
Greetings,
I am creating a ksh script to automate the installation of a utility on many servers.
As part of this install, I want to check for a job in root's crontab.
If the job exists, I need to comment it out.
I know I will need to copy off the crontab then read it back in, but I am struggling on commenting the job out while maintaining the integrity of the crontab.
The job will have the same path, so this is a constant to check for.
The crontab entry might not reside on the same line for each server.
Any tips would be appreciated.
Thanks
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LEARN ABOUT DEBIAN
kep_reload
KEP_RELOAD(1) General Commands Manual KEP_RELOAD(1)
NAME
kep_reload - Update Predict's Keplerian elements
SYNOPSIS
kep_reload
DESCRIPTION
KEP_RELOAD is a simple utility that forces an immediate reload of PREDICT's Keplerian database through a socket connection while PREDICT is
running in server mode. It is especially useful in environments where PREDICT runs continuously, and periodic Keplerian element updates
are made outside of PREDICT, such as through scripts run through a crontab.
The "kepupdate" script found in this directory is an example of a Keplerian element update script that can be run on an automated basis
through a crontab. It is designed to be placed in your home directory under a subdirectory called "cronjobs". It downloads Keplerian
orbital data from www.celestrak.com using the HTTP protocol. (The "wget" utility, available from the Free Software Foundation, is
required, and is included in many Linux distrubutions.)
Type crontab -e to edit your crontab. Simply add the following entry:
0 8 * * * kepupdate
and your orbital database will update each morning at 8:00 AM (provided you have a network connection at that time).
See the crontab man page for more information on editing your crontab.
AUTHOR
This man page was written by A. Maitland Bottoms, AA4HS, for Debian GNU/Linux.
31 August 2003 KEP_RELOAD(1)