To create users from the command line, check the manual pages for 'useradd' or 'adduser'. As you can imagine, 'userdel' (or similar) will get rid of accounts.

KDE probably has its own GUI for user management as well (which would not be unique to KNOPPIX).

Chances are that yout swap partition isn't ext2 nor ext3. Swap partitions tend to have their own filesystem.

Anyway, I think you can convert ext2 partitions to ext3 with the 'tunefs -j' command.

None of this information is specific to KNOPPIX and should work on most any current Linux distribution.

-SUO