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Git Essentials Part 1

Updated on March 24, 2015

What is Git?

  • Git is a software used to keep track of changes especially for text changes.
  • Git is revered as Version Control System or VCS
  • Primary purpose is to manage code or Source Code Management or SCM

Example of Version Control (Non-Source Code)

  • File naming (Payroll_v1.xls, Logo_v2.gif)
  • Microsoft Word's Track Changes
  • Adobe Photoshop's History
  • Wikis
  • Undo: (for Windows) Control + Z, (for Mac) Command + z

History (Most Popular)

1. Source Code Control System or SCCS BY AT&NT

  • (1st time)Keeps the Original Document, (2nd time) saved a snapshot or the changes.
  • 1972
  • Closed Source
  • Free with Unix

2. Revision Control System (RSC)

  • Cross Platform (Unix, Windows)
  • 1982
  • Open Source

3. Concurrent Version System (CVS)

  • Code Repository (Remote Server) that enable all users to work on a single file and commit changes they made on the single file.
  • 1986-1990
  • Open Source

4. Apache Subversion (SVN)

  • Faster than CVS.
  • 2000
  • Open Source

5. BitKeeper SCM

  • 2000
  • Closed Source, Proprietary
  • Distributed Version Control
  • "Community Version" was free
  • Used for source code of Linux kernel from 2002-2005
  • Controversial to use proprietary SCM for an open source project
  • April 2005: the "Community Version" was not free any more

6. Git

  • Created by: Linus Torvalds (Creator of Linux)
  • Distributed Version Control
  • Open Source and Free Software
  • Compatible with Unix and Windows
  • Faster than others SCM's
  • Better safeguards against data corruption
  • Launched 2008 to host Git Repositories

Distributed Version Control?

  • Different Users maintains their own repositories (own copy of a project), instead of working from a central repository
  • Changes are stored as "change sets" or "patches", not versions
  • No single master repository; just many working copies
  • Example: Document as sets A. B. C. D. E. F
    • Repo 1: A, B, C, D, E, F
    • Repo 2: A, B, C, D
    • Repo 3: A, B, C, E
    • Repo 4: A, B, E, F
  • No need of central server
    • Faster
    • No network access required
    • No single failure point
  • Participate by "forking" a project
    • Developers can work independently
    • Submit changes sets for inclusion or rejection

Git Rating

Cast your vote for Do you like Git?

Installation Steps

Step 1: Go to Git Website

Step 2: Download the latest version of Git for Windows (or depending on your Operating System)

Step 3: Open Git on your Download Folder, a setup wizard form will show, Click Next

Step 4: On GNU General Public License, Click Next

Step 5: Select the folder where Git will be Installed, Click Next

Step 6: Select the Components to be installed, Click Next

On the figure below we select Additional Icons, and Sample Context Menu (Registry Based)

Step 7:Select the folder where the program's shortcut will be set, Click Next

Step 8: Select the "Use Git from Git Bash Only" since it is the default configuration, Click Next

Step 9: Select "Checkout Windows-style, commit Unix-style line endings" since it is the default configuration, Click Next

Step 10: Wait while the setup installs Git on your Computer

Step 11: If Complete, Click Finish


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