Each user has only one crontab file and you add all tasks to it. Note: There is no file name or designation of any kind required when creating a crontab entry. To create one, I need to edit my crontab file: $ crontab -e To see a list of your configured cron tasks, use: $ crontab -l You can issue the man crontab command to see all possible options, but there are generally two that work for most users: -l (list) and -e (edit). The same is true for any user on the system, including the root user. In other words, if you create a cron task, it runs with your user account's permissions. The task runs under the user account from which it was created. Any user may schedule cron tasks or jobs on a system. The crontab file is a simple text file that instructs the cron daemon to perform a task at a certain time or interval. The user command to work with the cron service is crontab (cron table). The cron daemon ( crond) is a system-managed executable that runs in memory with which users may schedule tasks. It might surprise the saltiest of system administrators to know that there is no Linux cron command.
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