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Full Discussion: crontab entry modification using shell script
Top Forums Shell Programming and Scripting crontab entry modification using shell script Post 302124333 by crabbie_upk on Friday 29th of June 2007 05:23:02 PM
Old 06-29-2007
It will be easier in Perl or sed
You can doing using perl or sed.

To edit cron jobs of any user you will need to edit the file with corresponding username under /var/spool/cron (assuming Red Hat linux.. you can find this path for different *nix systems).

Hope that helps you.
 

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LEARN ABOUT NETBSD

atrun

ATRUN(8)						    BSD System Manager's Manual 						  ATRUN(8)

NAME

     atrun -- run jobs queued for later execution

SYNOPSIS

     atrun [-l load_avg] [-d]

DESCRIPTION

     atrun runs jobs queued by at(1).  Root's crontab(5) must contain the line:

     */10     *       *       *       *       root    /usr/libexec/atrun

     so that atrun(8) gets called every ten minutes.

     At every invocation, every job in lowercase queues whose starting time has passed is started.  A maximum of one batch job (denoted by upper-
     case queues) is started each time atrun is invoked.

OPTIONS

     -l load_avg
	     Specifies a limiting load factor, over which batch jobs should not be run, instead of the compiled-in value of 1.5.

     -d      Debug; print error messages to standard error instead of using syslog(3).

WARNINGS

     For atrun to work, you have to start up a cron(8) daemon.

FILES

     /var/at/spool  Directory containing output spool files
     /var/at/jobs   Directory containing job files

SEE ALSO

     at(1), crontab(1), syslog(3), crontab(5), cron(8)

AUTHORS

     Thomas Koenig <ig25@rz.uni-karlsruhe.de>

BUGS

     The functionality of atrun should be merged into cron(8).

BSD
								  April 12, 1995							       BSD
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