Version(software development project) Control System-VCS(A Developer's Friend)
============================================
Save a project(Taking snapshot) on a specific point(Adding Feature and save a version)
  -Adding new feature 
  -Modify extsing feature 

* A Life Lesson - 6 hours
  - 2 hours(simpler version)
  - 2 hours(3D version)
  - 2 hours (old version)


- Remote VCS server (GitHUB)




Software Development workflow
===============================
Facebook (Demo)
  -status management(branch)
      - image upload (version)
      - Link Management (version)
      - React System (version)
      - comment management
      - notification management
  - personal Profile management
  - Group management
  - page Management

** Working with GIT(Local version management)
  - Install git(git-scm.com)
  - configure git 
      -git config --global user.name 'name' 
      -git config --global user.email 'email' 

Working Dir         Staging area             commit(saved a version)
============      ===============           ====================
index.htm         git add fileName           git commit -m  '' 'Message'    
main.js           git add .                  git commit -am **


** Github is remote version of local Git feature management


*Some Important command
  - git init 
  - git status (see files in staging area)
  - git log  --oneline (show Log with commit and message)
  - git show commit_version
  - git reset 
  - git reset --hard
  - git checkout version
  - git branch 
  - git checkout branchName

 * Let's go live using github pages
  - git clone(github)
  - git push -u origin branchName(github)
  - git pull (git fetch + git merge)
 * Gitignore (Hide your Secret by ignoring files ) 
 

**Centra VCS or Distributed VCS vs Local VCS

central VCS (central place)
Distributed VCS(github)
- whole version dealt locally
local VCS



//skipping staging area(directly save a version) -tracked and modified

git commit -am 'message'

- staged/unstaged change(git diff)
git diff - show changes from working directory
git diff --staged -  show changes from working directory in staged area

1. Undo your Change
      - git revert commit_number /HEAD
      - git commit --amend

  Exiting unix editor 
      I - Insert
      ESC - :wq

2. working with open source repositories 
  another person - Fork -  own Github profile - clone (modify) - update to own github profile - pull request - owner github repo - review by open source project maintainer  - merge to the open source project    
      
3. Markdown