A few years ago I setup a cron job to automatically ping a URL every minute as part of a monitoring system (that's oversimplification, but it'll do for this question). Because I'm a horrible person, I didn't document this anywhere.Today, years later, I started having trouble with the application on the other end of the URL that's being pinged.  I fixed it, but then realized, I have no idea where this cron job is coming from.Is there a way to quickly search through or cat out all the crontabs on a particular system?  I have root access so permissions aren't a problem.  I've only ever been a user of cron, I've never looked too deeply at its implementation, but my *nix instincts say there has to be a group of text files somewhere that hold all the crontabs.  I just don't know where they'd be, and if I dug into it I'd be afraid of finding some, but not all of them, or missing some weird nuance of the systemAlso, I realize with root access I couldGet a list of all the users in the systemsu as a usercrontab -lRepeat with all the usersbut I'm looking for something a little less manual (and looking to learn something about cron's implementation)
How to Find a Fugitive Crontab
cron
There are only a few places crontabs can hide:/etc/crontab/etc/cron.d/*/etc/crond.{hourly,daily,weekly,monthly}/*these are called from /etc/crontab, so maybe an asterisk on this/var/spool/cron/* (sometimes /var/spool/cron/crontabs/*)Be sure to check at as well, which keeps its jobs in /var/spool/at/ or /var/spool/cron/at*/Also, instead of su <user>crontab -lJust do this:crontab -lu <user>