What does git push -u mean?

Question

I have two different versions of git. In the 1.6.2 version, git push does not have the -u option. It only appears in the 1.7.x version.

Fro

Answer 1

"Upstream" would refer to the main repo that other people will be pulling from, e.g. your GitHub repo. The -u option automatically sets that upstream for you, linking your repo to a central one. That way, in the future, Git "knows" where you want to push to and where you want to pull from, so you can use git pull or git push without arguments. A little bit down, this article explains and demonstrates this concept.