Pitch: schedule tasks using "at" on Fedora

Summary: schedule tasks for later execution (ex: run a script) using at command.

Description: being able to schedule a task for later execution, during the administration of a system is a crucial ability: to run a particular script or schedule any other job. Unlike cron, with 'at', we are able to execute a command or script. After reading this article, reader will be able to install at, configure, execute and manage the scheduled jobs.