Git

References

Git cheat sheet

• Git Home
• Git on Ubuntu
• Pro Git
• Git, from the bottom up
• Linux Greatest Invention
• Tech Talk: Linux Torvalds on git
• Git cheat sheet

Introduction

Git Features:

• Reliability
• Performance
• Distributed

Distributed

Originally from BitKeeper. Other distributed SCM is Mercurial.

• No single repository. Everybody always has his own copy of the repository. The repository content is pulled from other people's repository.
• No politics, no commit access control. All work is always done locally, so there is no need to define such politics.

Reliability

Every change, file, directory, etc. is cryptographically hashed (sha1sum).

• Easy corruption detection. Any tampering to a file or directory content (either malicious or because of hardware failure) is immediately detected.
• Easy distribution. Moreover because the repository is distributed all over the place, it is very easy to repair a given repository. You only need to drop all broken objects, and get all missing objects from a remote copy.

Performance

Very fast commit. Local repository

Terminology

hunk

individual change within a file (basically a file diff output is made of a sequence of one or more hunks).

Install

Packages:

• git-core — the main program
• git-gui — a gui front-end
• Web interface:
  • gitweb
  • ViewGit
• git-doc — documentation
• Project management:
  • gitosis