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Is there a command or an existing script that will let me view all of a *NIX system's scheduled cron jobs at once? I'd like it to include all of the user crontabs, as well as /etc/crontab, and whatever's in /etc/cron.d. It would also be nice to see the specific commands run by run-parts in /etc/crontab.
Ideally, I'd like the output in a nice column form and ordered in some meaningful way.
I could then merge these listings from multiple servers to view the overall "schedule of events."
I was about to write such a script myself, but if someone's already gone to the trouble...
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You can find them in /var/spool/cron/crontabs. The tables contain the cron jobs for all users, except the root user. The root user can use the crontab for the whole system. In RedHat-based systems, this file is located at /etc/cron.
Running crontab Edit your crontab. Display ("list") the contents of your crontab.
The user crontab In Linux, each user has their own crontab that can be used to schedule jobs that will be run as that user. You can view, update and delete a user crontab file using the crontab command.
The crontab -l command displays the contents of a crontab file much the same way that the cat command displays the contents of other types of files. You do not have to change the directory to /var/spool/cron/crontabs directory (where crontab files are located) to use this command.
You would have to run this as root, but:
for user in $(cut -f1 -d: /etc/passwd); do crontab -u $user -l; done will loop over each user name listing out their crontab. The crontabs are owned by the respective users so you won't be able to see another user's crontab w/o being them or root.
Edit if you want to know which user a crontab belongs to, use echo $user
for user in $(cut -f1 -d: /etc/passwd); do echo $user; crontab -u $user -l; done If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
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