[ Thanks to An Anonymous Reader for
this link. ]
“Consider this scenario… You are interested in installing
GNU/Linux on your machine. Assuming you already have the latest
version burned on to a CD, it is a simple affair of popping the CD
into your CD drive and starting the installation. But once the
installation is done and finished, you will most certainly want to
install additional software apart from the ones bundled with the
CD. And if you are using a Debian based Linux distribution such as
Ubuntu, you will be using the apt-get method. Over a period of time
you would have installed a number of additional software including
any packages satisfying their dependencies as well as upgraded some
of the software to the most recent version…”