Git

Git is a free and open source distributed version control system designed to handle everything from small to very large projects with speed and efficiency.

Git is easy to learn and has a tiny footprint with lightning fast performance. It outclasses SCM tools like Subversion, CVS, Perforce, and ClearCase with features like cheap local branching, convenient staging areas, and multiple workflows.

[Git, free and open source https://git-scm.com/]

Set global username/email:

   git config --global user.name "NAME"
   
   git config --global user.email "mail@example.com"

Set repository-specific username/email:

   git config user.name "NAME"

   git config user.email "mail@example.com"

   cat .git/config