Everybody loves a new Puppy. And those behind the Puppy Linux distro are happy to oblige, releasing a new version every couple of months. For the user or reviewer, it's a lot to keep up with. Luckily, upgrading is as easy as popping in a new CD. Puppy excels as a live-CD Linux distribution, and for those who want to run it in a "frugal" install to a hard drive, upgrading is as easy as copying a few new files. For traditional hard drive installs (recommended for low RAM), you have to reinstall the whole system, but just like with Damn Small Linux, even that process is quick, easy and intuitive. Or you can choose not to upgrade and stay with the Puppy that works for you.