Stack Exchange network consists of 175 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
I don't see any use for the linux tag.
It would seem to me that the only valid uses are when it is used instead of the kernel tag.
Looking at the list of questions, I think some of the questions need to be cleaned up first. It is not clear to me what this tag is actually used for based on browsing 15-30 questions with it.