We already discussed the details of CRONJOBS. Crontab is the program used to install, remove or list the tables used to drive the cron daemon.
We can create individual cronjobs for users under server. Click here for mode details about CRONJOBS.

Question : How to list cronjobs running under a user?
Answer :

# crontab -u $username -l 


[[email protected] ~]# crontab -u me -l
no crontab for me

Its simple, right?

Related Links:
crontab command and switches
10+ examples of Job Scheduling Using Crontab