Git Introduction¶
What is Git?¶
- It's a version control system that track changes
- We can work with Git and even know or care about Github at all
What is Github?¶
- Github is not the same thing as Git. Git is a technology.
- Github is a website/application that works with Git
Installing Git¶
Check if you have git installed in your environment
git --version
Git Basics¶
Git init¶
Setup directory structure:
mkdir Git
mkdir Git/git_intro
touch app.js
Run git init in the directory where you want git to keep track with
- Create a directory ".git" (hidden)
- To see it, use
ls -a
- If you accidentally init git in the wrong directory, use
rm -rf git to remove the .git folder
Git status¶
The command git status show status of followings:-
- On branch master
- Initial commit
- Changes to be commit
- Untracked files
File .gitignore¶
Git add¶
The command git add will add the file(s) that you want Git to track
// For single file
git add app.js
// For all files staged for commit
git add .
// For all files and directories
git add -A
Git commit¶
Must add before commit
Rule of thumb: use present tense in message
// -m: message to log
git commit -m "add app.js"
Git Log¶
Use command git log to view history of commits made
- use "ENTER" or up arrow to scroll
- type "q" in CLI to get out
Git Checkout¶
- Use to go back to previous version
git checkout [hashid]
// Back to current version
git checkout master
- Master ("branch master"): current version; Head: version we are at
- HEAD Master
O -> O -> O -> O
Revert git repo to a previous commit¶
- [CLI] git revert --no-commit [hashid]..HEAD
- [CLI] git commit
Cloning and Github Intro¶
- What is Github?
- Cloning an existing repo
Pushing to Github¶
- Creating a repo on github
- Adding a remote
- Pushing to github