NET 4000 Chapter Notes - Chapter 9.3.6: Init, Cron, Superuser
Document Summary
The cron daemon (crond) schedules tasks to run in the future on a regular basis. cron uses the following configuration files: The /etc/crontab (cron table) file holds entries that direct commands to execute at a specific time. Is used to schedule custom tasks that run system wide. Can only be edited by the root user. crond runs tasks scheduled in the /etc/crontab file as the root user. The cron daemon executes the scripts found in each of the following directories at the specified interval for the whole system: If permitted, each user can create a personal crontab file located at /var/spool/cron/username. The /etc/cron. allow file identifies users who are allowed to create their own cron jobs. If /etc/cron. allow file exists, then only users listed within it are allowed to create a crontab file in /var/spool/cron/username. All other users are denied and the /etc/cron. deny file is ignored. The /etc/cron. deny file identifies users who are not allowed to create cron jobs.
