Cron Job Not Running?

Any member know why cron job, is not rebooting the server @ 4am

I used,

Tutorial - Ubuntu amd.64-Bit 12.04 - Automated Oscam/CCcam 2.1.3 Install Package (thatfellow)

Something I did notice whilst upgrading Oscam, this command does not work (sudo killall -9 oscam)

Could this be causing the issue?

Same command not found?

Root say's command not found, user say's XxXxX is not in the sudoers file

Did a search on Google and did the following command apt-get install psmisc, now it seem's to work fine, wonder if cron job will work now?