Hardware Reference
In-Depth Information
Installing and Updating
Applications
he New Out Of Box Software, or NOOBS , that you learned about in Adventure 1
includes some applications that are installed along with the Raspbian operating sys-
tem. You can see these application icons on the desktop and also in the main menu. In
future adventures you will use Scratch and Python IDLE 3, which are already installed.
If you connected your Raspberry Pi to the Internet as described in Adventure 1, you
can use text commands to download, install and update additional applications that
you may wish to use.
Downloading and Installing
Applications
It's easy to ind new applications and install them on your Raspberry Pi. he Pi Store
( http://store.raspberrypi.com/projects ), for example is full of both free
and for-pay apps that you can download and use much like the Apple App Store. Try
typing the following command in a terminal and then pressing Enter:
sudo apt-get install scrot
Scrot (which is short for scr een sh ot ) is an application that enables you to take pic-
tures of the display on your Raspberry Pi screen. he sudo apt-get command tells
Raspberry Pi to use the Internet connection to ind and install the application on your
Raspberry Pi. his command requires sudo because by installing a new application you
are asking the Raspberry Pi to change system iles.
You will see the terminal window ill with writing and, after a few seconds, the termi-
nal will ask you to check that there is enough space on your SD card to install the
application. At this point you can either press the Y key for yes, to continue with the
installation, or the N key for no, which will cancel the installation. Figure 2-8 shows
the screen display for the scrot installation process. About halfway down the screen,
you see the question “Do you want to continue [Y/n]?” and see that I answered yes (y)
to install the application.
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