=== List cron for a specific user:===
<sxh bash>
crontab -u username -l
</sxh>
\\
===List crons for every user ===
<sxh bash>
for user in $(cut -f1 -d: /etc/passwd); do echo -$user-; crontab -u $user -l; done
</sxh>


<sxh bash>
for cron in `ls -1 /var/spool/cron/crontabs/`; do echo "${cron}'s crontab";crontab -l -u $cron | grep -v '#' ;echo;done
</sxh>
\\
=== Viewing Cron Start Time ===
<sxh bash>
date; echo; ps -ef --sort=start_time | grep php | head -n 15
</sxh>