Git

• Git is a distributed version-control system
• Git track changes in files in any folder called repository
• Git is a persistent hash map that stores key-value pairs
• Git has its own file system

Definitions

• Git: Version control software
• Github: Server to store repositories
• Repository (Repo): Place to store codes
• Commit: Save file
• Commit hash: Personal identifier for the commit
• Branch: Ramification of the master branch
• Pull request: Suggests that the master pull your branch to incorporate
• Merge: The action of merging the branch into a master
• Fork: Copy the whole repository of another person to yours. After that pull requests can be done
• Clone: Copy a repo to your local machine

Git folder

• config: list of git configuration (.git/config)
• description: description of the the repo (.git/description)
• HEAD: current version of files (.git/HEAD)