Linux is a popular operating system that is based on the Unix operating system. It has many distributions which have different interfaces for installing software, different user interfaces, and so on. One thing all of the ‘distros’ have in common is that they all have a command line interface, or terminal. In fact, sometimes there is no user interface except the terminal itself. A Linux server running a web application on AWS, for example, may only contain the software required to run the application, and no GUI ‘window’ system at all. It is crucial to learn the Linux command line if you are going to be a productive Linux user and/or administer a Linux server. In this course, you will use Linux commands to navigate Linux directories, search for files, search for patterns, create files and directories, and remove files and directories.