Comment 4 for bug 341377

Bash is a part of GNU project and it isn't the correct alternative always. In number one, the whole operating system is case sensitive, not only Bash (filenames, most of programming language, and so on). In number two, you can see clearly that the whole system is meant so as in number three and four. We don't have to 'explain' the GNU/Linux story, we shall only name it correctly when we mean the entire operating system.

Anyways, I think the issue is simple enough. Replacing the few terms will mention the operating system correctly and will cause no problems, as we always do in Ubuntu Documentation.