Cron Job "Command" Field explanation

[survice]

Hello,

What does the "command" field under cron job do ?

When do i need to fill anything in there ?

Regards,

Survice

 

[tillo]

It's a shell command.
Quoting Wikipedia, "Cron is driven by a crontab, a configuration file that specifies shell commands to run periodically on a given schedule." -- how would you specify a shell command to run without having a "command" field?