[HOW TO] list all cron jobs for all users

To show the list of cron jobs you can run crontab -l, which only shows the cronjobs of the current user. To list all cronjobs for all users you can write a bash script and run it as superuser:

#!/bin/bash
#List all cron jobs for all users
for user in `cat /etc/passwd | cut -d":" -f1`;
do 
crontab -l -u $user;
done

Site refer:  http://www.linux-faqs.info/bash/list-all-cron-jobs-for-all-users

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