Cron setup

[iTpain]

Hello i try to setup a cron as i need it for a program but the tutorial on this site it say to set ownersip of var/spool/cron to apache but for my VPS based on ubuntu 14.04 x64 there is no such users at least this is says on terminal and the /var/spool/cron/apache dose not exit
And also i did run this command in terminal
crontab -e
and i get

-bash: crontab: command not found


and when i try to add a cron in sentora panel i get

Error: System Cron file could not be created

[iTpain]

Nobody have any idea

[Me.B]

www-data should be the owner on ubuntu.

M B