Quest1: install software packages on Ubuntu

#1. Applications > Add/Remove...

Choose a package you want to install and then click "Apply changes"





#2. System > Administaration > Synaptic Package Manager

Choose a package you want and then click "Apply"





#3. Application > Accessories > Open "Terminal" window


Type "sudo apt-get install nmap" > Hit "Enter"
It is a command to install the network scanner nmap.