Installing New Software
Package managers handle the downloading and installation of software, and they automatically handle downloading and installing dependencies. The command line is the most flexible and quickest way to install software on your Raspberry Pi. The program apt-get with the -install switch is used to download software. apt-get will also download all of the other software that your package requires so that you don’t have to go hunting around for dependencies. Software is installed with superuser permissions, which means you must type in the command sudo :
pi@raspberrypi ~ $ sudo apt-get install emacs
There is a program named scrot (an abbreviation for SCReenshOT) that can be installed that will allow you to take a screenshot. Another option to capturing screenshots is to install the GNU Image Manipulation Program (Gimp) or ImageMagick. To install scrot type:
sudo apt-get install scrot
