If you don't have a `.gitconfig` file in your home directory, create it: touch ~/.gitconfig

.gitconfig

[user]
        email = [email protected]
        name = The name you want showing up in commits

[core]
        editor = vi

[push]
        default = current

[color]
        ui = auto

[diff]
        renames = true

[alias]
        ci = commit
        co = checkout
        st = status
        lg = log --graph --pretty=format:'%Cred%h%Creset -%C(yellow)%d%Creset %s %Cgreen(%cr)%Creset' --abbrev-commit --date=relative
        pu = !"git fetch origin -v; git fetch upstream -v; git merge upstream/master"

[branch "master"]
        remote = origin
        merge = refs/heads/master