Manual Suse openSUSE 11.3 (page 95 of 178) (English)

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7 Shell Basics

When working with Linux these days, you can communicate with the system almost

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 cong-

ured 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 be-

cause 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 rst when entering

commands, but the more you get used to it, the more you will realize that the com-

mand line is often the quickest and easiest way to perform some daily tasks.

For UNIX or Linux several shells are available which dier 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 rst 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 shell “power user” already, refer to

Chapter 20, Bash and Bash Scripts (↑Reference).

7.1 Starting a Shell

Basically, there are two dierent ways to start a shell from the graphical user interface

which usually shows after you have booted your computer:

• you can leave the graphical user interface or

• you can start a terminal window within the graphical user interface.

While the rst option is always available, you can only make use of the second option

when you are already logged in to a desktop such as KDE or GNOME. Whichever way

you choose, there is always a way back and you can switch back and forth between

the shell and the graphical user interface.

If you want to give it a try, press [Ctrl] + [Alt] + [F2] to leave the graphical user inter-

face. The graphical user interface disappears and you are taken to a shell which

prompts you to log in. Type your username and press [Enter]. Then type your pass-

Shell Basics 85

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Suse openSUSE 11.3 Manual

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