cron

Execute scheduled commands

cron is daemon to execute scheduled commands

crontab is maintain crontab files for individual users

• crontab is the program used to install, deinstall or list the tables used to drive the cron(8) daemon in Vixie Cron.
  Each user can have their own crontab, and though these are files in /var/spool/cron/crontabs, they are not intended to be edited directly.