$ git config --global user.name <name>
Define the author name to be used for all commits by the current user.
$ git config --global user.email<email>
Define the author email to be used for all commits by the current user.
$ git config --global alias. <alias-name> <git-command>
Create shortcut for a Git command. E.g. alias.glog log --graph --oneline will set git glog equivalent to git log --graph --oneline.
$ git config --system core.editor <editor>
Set text editor used by commands for all users on the machine.
arg should be the command that launches the desired editor (e.g., vi).
$ git config --global --edit