Cron is nice and all, but don't forget about its cousin at.
When I first started using Linux, it was like being tossed into the deep end
of the UNIX pool. You were expected to use the command line heavily along
with all the standard utilities and services that came with your
distribution. At lot has changed since then, and nowadays, you can use a
standard Linux desktop without ever having to open a terminal or use old
UNIX services. Even as a sysadmin, these days, you often are a few layers of
abstraction above some of these core services.