Hi all, I'm looking for your thoughts/advice on advancing my GNU/Linux knowledge. This is not strictly a Fedora question, but as it's always been my distro of choice I thought I'd ask my question here. I love learning all kinds of different operating systems, for Work reasons I have to learn all desktop versions of Windows, and as such I spend a considerable amount of time on that platform - albeit not through choice. I was first introduced to RedHat Linux around 7 years ago, and still stayed with RH and Fedora as my main choice of Linux since. But I have spent most of the time distro hopping and learning bits of Debian, Slackware, Gentoo, Arch, SuSE, FreeBSD and even Linux From Scratch (only as far as finishing the install stage and getting a basic working system for LFS.) Now OS's like OpenSolaris look attractive, Ubuntu seems worth learning as it's the most talked about potential Windows killer and I already have Debian experience. My question is that I'm not sure what to do to improve my deeper knowledge of Linux and similar OS's. Would I learn all I need/just as much sticking with Fedora - one distro? or will I learn more by multi booting all these other *nix variants? They all seem so interesting with all their different tools, and unique ways of doing things; but is it too much to try and learn them all? A friend of mine suggests running just one OS at a time otherwise I will never progress to a more advanced stage. All thoughts/advice welcome. And sorry for my rambling :-)