8.0 Shell Basics
When working with Linux nowadays, you can communicate with the system
nearly without ever requiring a command line interpreter (the shell). After
booting your Linux system, you are usually directed to a graphical user
interface that guides you through the login process and the following
interactions with the operating system. The graphical user interface in
Linux (the X Window System or X11) is initially configured during
installation. Both KDE and GNOME desktop and other window managers you can
install use it for interaction with the user.
Nevertheless it is useful to have some basic knowledge of working with
a shell because you might encounter situations where the graphical user
interface is not available—for example, if some problem with the X
Window System occurs. If you are not familiar with a shell, you might feel a
bit uncomfortable at first when entering commands, but the more you get used
to it, the more you will realize that the command line is often the quickest
and easiest way to perform some daily tasks.
For UNIX or Linux several shells are available which differ slightly in
behavior and in the commands they accept. The default shell in openSUSE®
is Bash (GNU Bourne-Again Shell).
The following sections will guide you through your first steps with the
Bash shell and will show you how to complete some basic tasks via the
command line. If you are interested in learning more or rather feel like a
power user already, refer to