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So you have been using Linux for a while, you even read up on the Ubuntu Beginner’s Guide and are using Ubuntu as your new operating system and are looking for more.
With Linux, you have a more hands on OS. One of Linux’s major tools is the command line. The command line can do almost anything. But to do anything with the command line, you must know or have access to the commands to make command line. 
Linux Command Line Cheat Sheet
One of the easiest ways to get those commands is through cheat sheets. The cheat sheets not only make it easy for you easily find the commands you need, but they also make it easier for you to learn those commands as you use them
To help you get started with the Linux Command Line, check out this Linux Cheat Sheet by Dave Child. Image source: Flickr
About James
Nice little cheat sheet, to be honest once you get used to the terminal you start to memorize all the commands but when you are starting out its nice to have something to refer to without having to constantly search.