Linux Crontab

Overview

Crontab is the program used to install, deinstall or list the tables used to drive the cron 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.

Each user has their own crontab, and commands in any given crontab will be executed as the user who owns the crontab. Uucp and News will usually have their own crontabs, eliminating the need for explicitly running su as part of a cron command.

  • To view crontab file:

$ crontab -l

  • To edit crontab file:

$ crontab -e

  • To remove crontab file:

$ crontab -r

  • To display the last time you edited your crontab file:

$ crontab -v

cron

(credit image: link)

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