Crontab Management

Crontab 

The crontab file is configured as above.

Cron Job Commands

export EDITOR=vi ;to specify a editor to open crontab file.

crontab -e    Command to edit an exsisting crontab, or create a new to create a new one.
crontab -l     Displays your crontab file.
crontab -r    Remove a crontab file.
crontab -v    Display the last time you edited your crontab file. (This option is only available on a few systems.)