Youtube

1. GitHub and Git Fundamentals Playlist

2. What is GitHub?

3. Installing Git on Windows

4. Installing Git on Mac

Creating Git Repo Locally

Go to an empty directory and run:

git init

Adding files to Git Repo

Create a file README.txt with some test contents

If you do 'git status' the README.txt file will be shown as un-tracked file.

Run:

git add README.txt

Notes:

To add all files in a directory:

git add .

To add only modified files:

git add -u

System Level Configuration

git config --system

Stored in etc/gitconfig in Mac / Linux. Similar structure in Windows, usually within usually within Program Files.

User Level Configuration

git config --global

Stored in ~/.gitconfig in Mac / Linux. Similar structure in Windows, within user home folder.

Repository Level Configuration

git config

Stored in .git/config in each repo.

Single File Systems 

Users could make their own revisions of a document, commit changes, and merge them together. However, these systems (e.g. TCS) operates only on single files. It has no way of working with an entire project, so it does not support atomic commits affecting multiple files. 

Examples include SCCS, RCS etc.