Where is PATH

[Tanguy CARRABIN]

    Hi all,
First, I want to thank all of you who had helped me with getting my
kernel to work.
... but a problem solved is another problem found !!!

I'd like to know how to edit and change the PATH.
I'm trying tu update some libs, but at the end of the install procedure,
I get the message that I have to add a path of a directory to the
LD_LIBRARY_PATH.

Thanks,

Tanguy