This depends on a web host and a plan. Most plans will allow running scripts in languages such
as Perl or PHP. Some plans will also allow you to compile program in C/C++ and run them.
Some Unix plans will also allow you to run "cron" which enables you to automatically execute
programs or scripts at a specific time and date. However to get a full control over all aspects of
your server, you will need a dedicated or co-located server instead of a shared plan.
