Answering to myself, I tried wrongly to set the environmental variable by writing them in my home .bashrc. I should have recognized that now sda6 is root.

Actually,
#printenv |less

shows
HOME=/

The environmental variables are to be set from terminal window, which means any time knoppix is launched. They are set correctly, while
HOME=/
can not be changed.

Under such conditions, as expected, trying to launch my application:

Error while loading shared libraries: libXm.so.3 not found.

That is to put OpenGL to work.

QUESTION: should I modify /etc/apt/sources.list
by merely adding debian repositories, or changing something else too?

What do you expect will happen on
#apt-get update
?


Cheers

francesco