Installing Ubuntu teaches you nothing. Installing Arch teaches you Linux.
Ubuntu has just been too bloated for me lately. Seriously. I enjoy running underpowered systems (think a half gig of RAM) smoother than people run $1000 computers. To do this, I either need XP Pro with everything off, or Arch Linux. Ubuntu actually lags worse than Vista for me with the new Unity desktop.
Did you know that 8GB is like $40?
yeah... so? Note the word "enjoy" in my post.
Seriously I ran linux with a lot less than half of gig, half of meg was fine.
yeah... so? Note I was beating on Ubuntu, not Knoppix. Ubuntu feels like Macintosh meets Vista. *shudder*