"As we'll discuss, you can use them for experimentation,
routing, security, file or Internet serving, and more. Make one of
the projects your late-night endeavor on the weekend or your new
project at work.
"#1 Install Ubuntu or other distribution to experiment with
"If you haven't already, you could discover the world of free
and open source computing by fiddling around with Linux. Within an
hour or so, you can download and install Ubuntu, or one of the
other thousands of distributions (distros) onto your old PC. You
can even test it out before installing anything to your hard drive,
using the live CD mode of some distros."