Datasheet

21
Working with the Shell
Wor king with the Shell
Graphical user interfaces are increasingly becoming important for Linux, but us-
ing the mouse is not always the best way to perform daily tasks. The command
line provides high flexibility and efficiency. The first part of this chapter provides
an introduction to the Bash shell. It is followed by an explanation of the user per-
missions concept in Linux and a list of the most important commands. The chap-
ter closes with a description of the vi text editor.
21.1 Introduction to Bash . . . . . . . . . . . . . . . . . . . . . 256
21.2 Users and Access Permissions . . . . . . . . . . . . . . . 265
21.3 Important Linux Commands . . . . . . . . . . . . . . . . 270
21.4 The vi Editor . . . . . . . . . . . . . . . . . . . . . . . . . 278