[Why] Git

Guiding principles and implications

• Speed
  • everything is local
• Simple design
• Strong support for non-linear development (thousands of parallel branches)
  • painless branching
• Fully distributed
  • full history cloned locally
• Able to handle large projects like the Linux kernel efficiently (speed and data size)
  • snapshots & pointers

Persistent map of keys and values. Pointers to trees and blobs.

echo “Apple II” | git hash-object —-stdin

open .git
# print out content of file
git cat-file sha1 -p

like a high-level versioned, file system that sits on top of your file system. Linus Torvalds OS engineer.

like 3 mini file systems

#ls
git branch

#cd
git checkout

#mkdir
git checkout -b