git

The version control system. https://git-scm.com/

Snippets

git add -N <path> - start tracking a file, without adding its content to index. Useful to make the file visible in git add -p or git diff.
git subtree pull --prefix <localdir> --squash <remote> <remote-branch> - updating contents of a subtree
git tag --sort v:refname - list tags, sorting like version names (so 1.11 > 1.2)

$ git remote -v
origin  /etc/ (fetch)
origin  /etc/ (push)
$ git fetch origin master:master