crontab install, edit, remove or list a user's crontab file
a list of program command lines along with a specification of when to run that command line
a simple text file that holds a list of commands that are to be run at specified times
A crontab is a file that contains the cron system scheduling table. Separate files hold the tables for each user and the system-wide cron services.
Maintains crontab files 1129
Maintain crontab files.
The crontab command, found in Unix and Unix-like operating systems, is used to schedule commands to be executed periodically. It reads a series of commands from standard input and collects them into a file also known as a "crontab" which is later read and whose instructions are carried out. The name is derived from Greek chronos (Ï‡ÏÏŒÎ½Î¿Ï‚), meaning time.