well, this is the first time in years I've used any sort of Linux. Used to use SunSparc stations in a CAD job I had about 10 yrs ago, but not much in the way of command line stuff.
But I do have years of DOS experience if that helps.
edit: I did have to do a lot of messin around in the terminal with different commands to get my USB adsl modem working. The main problem was getting my head around the filesystem on Ubuntu.