The document provides an introduction to Git, including its inventor Linus Torvalds and the origin of its name. It explains the differences between central and distributed version control systems, as well as how Git stores data through snapshots rather than file changes. Additionally, it includes a hands-on exercise for installing Git, creating a local repository, and managing file states, such as committing and modifying files.

1. GIT 101

2. Who invented Git?
QUIZ!

3. Linus Torvalds
ANSWER

4. Why is it called
Git?
"the stupid content tracker”
Linus Torvalds has quipped about
the name "git", which is British English
slang for a stupid or unpleasant person:
"I'm an egotistical bastard, and
I name all my projects after myself. First
Linux, now git."
(Note that Torvalds did not in fact name
Linux.)

5. Central vs Distributed VCS
CENTRAL VCS DISTRIBUTED VCS
Each can act as a serverthe dev team only interacts with the main server

6. Distributed VCS
Benefits
You can start a repository at any time on your
local computer
Commit history is stored locally
Redundancy - each working copy effectively
functions as a remote backup

7. How Git stores data?
• most other systems store information as a
list of file-based changes
• Git thinks of its data more like a set of
snapshots of a miniature filesystem
• Every time you commit, or save the state of
your project in Git
• Git thinks about its data more like a stream
of snapshots.
• Git tracks files not folders

8. The Three
States
states of files
committed
stored in local
repo
modified
changed but not
committed
staged
marked to go
into next commit

9. Three
sections of
Git project

10. Hands-on exercise
1. Install Git on Windows
◦ http://git-scm.com
◦ Download and run installer
2. Install Git on Mac
◦ Type in terminal: git version
3. Configure Git
◦ git config –-global user.name “Your Name”
◦ git config --global user.email “your.email@sephora.com”
4. Create local repository
◦ git init

11. The Basics
→ Open terminal
→ Create a location for the lab
mkdir projects
cd projects
→ Create a repository
git init git-101
ls –al
cd git-101
cd .git

12. Commit
git status
 Create a file README.md
touch README.md
git add README.md
git commit –m “My first commit”
git log
git show
 Modify README.md
git status
git commit –am “My second
commit”
git log

13. Backing out changes
 Modify README.md
git status
git add .
 How to unstage changes?
git reset HEAD README.md
git status
 How to revert changes entirely?
git checkout -- README.md

14. Rename and remove a file
Create a file example.txt
git status
git add example.txt
git commit -m "adding example file"
git mv example.txt demo.txt
ls
git status
git commit -m "renaming example”
git rm demo.txt
git commit -m ”removing demo”

15. GIT
States
with
Remote

16. How to
change
Git state

17. Summary
git init <repo-name>
git status
git add <file1-name> <file2-name>
git commit -m "<Messgae>”
git show
git log
git mv <fil1> <file2>
git rm <file1>

18. Next Week
Work with remotes
Create Branches
Create Pull Request