# Git

## Concepts

* hash
  * sha1 (sha256)

## Porcelain

* git init
  * bare | non-bare
* git config
  * user name & email
  * description
* git worktree

## Plumbing

* .git/config
* .git/description
* .git/objects
  * .git/objects
  * git hash-object -w file
  * git cat-file -p hash