Linux Command Directory
This directory of Linux commands is from Linux in a Nutshell, 5th Edition.
Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.
System administration command. Normally started in a system startup file. Execute commands at scheduled times, as specified in users' files in /var/spool/cron. Each file shares its name with the user who owns it. The files are controlled via the command crontab. The crond command will also read commands from the /etc/crontab file and from the /etc/cron.d/ directory. See anacron for scheduling events on systems that are frequently rebooted or powered off, such as notebook computers.
Run the command in the foreground.
Remove security restrictions on crontab file