Master Git and GitHub: From History to Hands‑On Setup and Collaboration

Git and GitHub History

Git was created by Linus Torvalds in 2005 as a distributed version‑control system after the community lost access to the commercial BitKeeper tool. Within a month Git took over the Linux kernel source management, and in 2008 GitHub launched to host remote repositories, fostering strong open‑source communities.

Why Use Git and GitHub

Git enables version management, collaborative editing, file‑state tracking, permission control, branch management, and distributed repositories that improve efficiency, safety, and flexibility for developers.

Installing Git

CentOS

sudo yum install git-all
git --version

Ubuntu sudo apt-get install git Windows

Download from git-scm.com .

Configure Git

git config --global user.name "guangguang"
git config --global user.email "[email protected]"
git config --global merge.tool "kdiff3"
git config --global core.autocrlf false
# Encode settings
git config --global gui.encoding utf-8
git config --global core.quotePath off
# Windows case handling
git config --global core.ignorecase false

Generate SSH Key

ssh-keygen -t rsa -C "[email protected]"
ssh-add ~/.ssh/id_rsa
cat ~/.ssh/id_rsa.pub

Copy the public key to GitHub → Settings → SSH keys.

Link Local Repository to GitHub

git remote add origin https://github.com/qqdb/example01.git

Replace the URL with your repository address.

git push -u origin master

Subsequent pushes use git push origin master. Force push ( git push -f origin master) should be avoided after the first push.

Clone a Repository

Use git clone https://github.com/owner/repo.git in your IDE (e.g., PyCharm) or command line.

Fork and Contribute

Click “Fork” on a GitHub project to create your own copy. Clone the forked repo, make changes, commit, and push. Open a pull request on the original repository, where maintainers can review and merge your changes.

Typical Git Operations in IDE

IDE integration (e.g., PyCharm, IntelliJ IDEA) provides UI for committing, pushing, pulling, branching, and handling merge conflicts, streamlining the workflow described above.