change git username and email command code example

Example 1: set email git

git config --global user.email "[email protected]"

Example 2: git config username

$ git config --global user.name "John Doe"
$ git config --global user.email [email protected]

Example 3: git config --global user.name "Server"

cat .gitconfig

Example 4: git change user for single repo

$ git config user.name "John Doe"