This is a tutorial for the NosillaCast on how to use APT (Advanced Packaging Tool) from the command line in Ubuntu Linux.
To add a PPA in Ubuntu 9.10 Karmic Koala:
1.) Open a Terminal
2.) Type: “sudo add-apt-repository Insert-PPA-Here”, replacing “Insert-PPA-Here” with the URL of the PPA. (EG. ppa:ppa/section)
To add any other repository:
1.) Open a Terminal,
2.) Type: “sudo gedit /etc/apt/sources.list”
3.) Paste the APT line of the repo at the end of the document. (EG. deb http://download.virtualbox.org/virtualbox/debian karmic non-free)
4.) Save and quit
My new APT line is highlighted.
If it requires a key, add the one provided on the site (usually it doesn’t)
1.) Open a Terminal
2.) Get the key from the site. (EG. wget http://download.virtualbox.org/virtualbox/debian/sun_vbox.asc)
3.) Add it with: “sudo apt-key add Key-Path”, replacing “Key-Path” with the path to the key. (EG. sun_vbox.asc)
Adding the key
To install a package:
1.) Open a Terminal
2.) Update the package listing: “sudo apt-get update”
The command only. The results can be seen in the next image.
2.) Type: “sudo apt-get install Package-Name”, replacing “Package-Name” with the name of the package. (EG. virtualbox-3.1)
3.) Tell it “Yes!”
4.) Wait, have a cup of coffee
5.) Run your app!
Installing VirtualBox
The Binary Clock 