User Guide

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• On the application menu, click File and then click
Quit.
• Type the following command and then press Enter:
exit
Understanding Linux Users and Superusers
If you have used more recent versions of Microsoft Windows
then you may be used to running certain applications as an
administrator. This concept is also in Linux.
Superusers (often called “root”) have full access to the system.
Any applications you run as a superuser will also have full access
to the system. To protect the system from accidental or
malicious damage, you rarely login to Raspbian as a superuser.
Normal users have less access to the core files needed by the
OS, and this means that any applications that they run also have
less access to the system. In Raspbian, pi is the user that logs into
the desktop environment, and it is a normal user.
When you do need to change part of the system, or accomplish
a task that only superuser can do, you can use the command line:
• Type sudo followed by a space, and then the
command that requires superuser access privileges.
If you start a desktop program with sudo then the program also
has full access to the system.
To start a command line and switch to a superuser (so that you
do not need to type sudo with each command):
1. On the Application Launcher, click LXTerminal.
2. Type the following command and then press Enter:
sudo su
If you only want to run a single command, you can do this from
the Raspbian Menu. Click the Menu button and then click Run.
Type your command and then press Enter.