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I just want to pause everything. Don't execute anything listed on crontab -l.

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5 Answers 5

up vote 10 down vote accepted

crontab -e then comment out each line you don't want to run with #.

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2  
oof...... this is the best solution the *nix community made over the years? –  New Alexandria Oct 20 '12 at 14:08

First, back up the crontab:

crontab -l > my_cron_backup.txt

Then you can empty it:

crontab -r

To restore:

crontab my_cron_backup.txt
crontab -l
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Do you have root access? Just pause cron

sudo /etc/init.d/crond stop

Then restart it when you're ready

sudo /etc/init.d/crond start
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That is assuming you want to stop crontab for all users including root. The selected answer, and kubanskamac's answer would do it for just the current (desired?) user. –  Kevin K Dec 15 '09 at 0:20

If you are using vi as editor, then just enter :%s/^/#/ in command mode. In all lines (%), it substitutes (s///) the begin of line (^) with a hash (#).

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If you are not using vi as default editor, you can "force" usage of vi like EDITOR=vi; crontab -e, and than you can use the trick above. –  Betlista Jan 25 '13 at 11:53
    
To uncomment, command is :%s/^#// –  NP01 Aug 14 '13 at 3:18

Wasn't happy with the options above since they weren't one liners.

To disable crontab -l | perl -nle 's/^([^#])/# $1/;print' | crontab

To enable crontab -l | perl -nle 's/^#\s*([0-9*])/$1/;print' | crontab

usage example ( edited to show it doesn't disable comments)

$ crontab -l
# Comment
0 0 * * 0 /opt/something.sh

$ crontab -l|perl -nle 's/^([^#])/# $1/;print'|crontab
$ crontab -l
# Comment
# 0 0 * * 0 /opt/something.sh

$ crontab -l|perl -nle 's/^#\s*([0-9*])/$1/;print'|crontab
$ crontab -l
# Comment
0 0 * * 0 /opt/something.sh

Tested this on RHEL and AIX , and should work out of the box without anything needed to be installed

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