Sure its definitely a trivial thing todo, but I thought I'd post how to get up and running within a minute using Gnome Schedule in Ubuntu(I'm sure Gnome Schedule is available for most linux distros as well). First just open up Synaptic Package Manager and do a search for Gnome Schedule.
Check the box beside Gnome Schedule and click Apply at the top. Wham! You should now have it installed. To open the scheduler gui go to Application -> System Tools -> Scheduled Tasks.
We now have a dirt simple scheduling program. If you can't figure out what to do from here you're hopeless. Just click New and enter which type schedule you want to execute (reoccurring, one time, or you can use a template)