Shell scripts
A shell script has a myriad of purposes on a Linux box. You can have them run at bootup so that they initiate commands or processes without you having to manually start them. They can be used to run a sequence of events. They can manipulate files, execute a program, print text, and walk your dog. Well, the last part is true if your dog is a robot. However, we're getting ahead of ourselves.
Epoch time, more commonly known as UNIX time (also POSIX time), is widely used in Linux (UNIX) systems as a way to describe instants in time. Specifically, it measures the number of seconds that have elapsed since January 1, 1970, and is used as a timestamp reference point.
With this shell script, we can quickly compare the Epoch time on our machine with the UTC that we are more accustomed to using.