Louis wants to run a dummy web server on an old eMac for running Ruby and Ajax. Leo says the eMac was good for its time, but he'll need a Linux distro that's compatible. Ubuntu may be too heavy for it. Running it command line would be the best for that computer and how low power it is. Linux Mint has a Power PC version. Check out DistroWatch.org, where they list all the Linux distributions, and he can pick the features he wants.