Historically, operating systems generally come with some form of scripting language which admins and power users can use to create custom tools. Harking back to the home computer craze of the 1970s ...
Finding the version of Clojure you are using is as simple as executing one of the following commands inside the Clojure REPL, which you can enter by running clojure: # clojure Clojure 1.8.0 user=> ...