Navigating and Essential Commands

At this point in our journey, we’ve already covered a lot of ground—we’ve learned how to deploy an Ubuntu server, how to manage users, and most recently, how to manage software packages. Before we go too far, we should take a moment to learn some important concepts and commands that will allow us to build more of the foundational knowledge that will serve us well for the remainder of the book and beyond. These foundational concepts include core Linux commands for navigating the shell, the Linux filesystem layout, viewing the contents of files, and even checking on log files. Specifically, this discussion will include:

• Learning essential Linux commands
• Understanding the Linux filesystem layout
• Viewing the contents of files
• Viewing application log files

Let’s take some time to learn some essential Linux commands that will help strengthen our command-line skills.