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Command to ON/OFF cron job

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Is there any command that can switch ON/OFF cron job in Ubuntu?

As far I know to open crontab -e and comment out each cron job. Is there any single command to stop all cron job and restart later?

Currently I have multiple cron jobs running on different time to send email alerts, monitoring results, automatic DB update(hourly), weekly status etc

But then during maintenance time, I need to stop all these cron jobs and restart once maintenance is over. Now disabling one by one with # symbol.

Is there any solution?

Answers

For the single cron job you can comment by editing crontab -e If you have to stop all the cronjobs:

 sudo service crond stop

 sudo service crond status

 sudo service crond restart

OR

 /etc/init.d/cron start

 /etc/init.d/cron status

/etc/init.d/cron restart

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