While graphical user interfaces are generally easier to use, many of the tasks you must perform to administer and support a Linux system must be done from the command line. Basically, end users use the GUI; administrators use the command line.
EXAM TIP On the LPIC-1 and Linux+ exams, you will be tested very heavily on your ability to use the Linux CLI to manage the system.
Therefore, we will spend a great deal of time working with the Linux command-line interface in this book. We will discuss the following topics:
• Linux shells
• Managing shell configuration files
Let’s begin by discussing commonly used Linux shells. ...