I'm not sure why you're doing it from source. Anyway, filmgimp is now CinePaint. There are debs available:

http://packages.debian.org/unstable/...cinepaint.html

If you're in the command line, you're already in bash (the Bourne Again SHell) . There's no way you want to use the old Bourne Shell.

The root prompt looks different to the user prompt (usually). I have (as myself): john@niglo:~$

as root

root@niglo:/home/john#

But it looks to me as though you're reading part of an installation script.

Exactly what are you reading and what are you seeing?