>>9
OK, here's how you do this.
First, you must launch a terminal. Double click the terminal icon on your desktop.
Then, type this:
sudo apt-get install appname
You may also copy and paste this. Confirm with enter.
Sudo gives your root privileges. It should prompt for your password. Type your password, then press enter (your password is not shown as you type it, so don't worry, nothing's wrong).
Never run commands with sudo you found on the internet before knowing what they do!!!
There, all done! Welcome to Ubuntu!