I have looked at cron before, but what if someone else has gained access to your Linux system and added a cron job without your knowledge? Linux systems such as Raspbian store the crontabs as files (named for each user).
A user’s crontab can be found under the /var/spool/cron/crontabs directory. You may need to escalate your account privileges to access the crontabs directory.
The directory /var/spool/cron/crontabs contains text files for each user that has a crontab. In this example the root user has a crontab, which can be viewed using the less or cat command, or edited using a text editor such as nano.
So if you are running a command such as top and see unusual activity from cron, make sure to check out the crontabs directory.
Thanks for reading, and also welcome to the GeekTechStuff “Linux” category. In the past I have posted most of my Linux findings to the “Raspberry Pi” category of my site but as my Linux learnings are growing I have decided to expand and create a Linux category.