add: article about Setting Up SSH Authentication for GitHub

Author: szuryuu

content/authentication/connecting-to-github-with-ssh/setting-up-ssh-authentication-for-github.md

@@ -0,0 +1,99 @@
+---
+title: Setting Up SSH Authentication for GitHub
+intro: 'Learn how to securely connect to GitHub using SSH keys for seamless repository access and code pushing'
+versions:
+  free-pro-team: '*'
+  enterprise-server: '*'
+  enterprise-cloud: '*'
+type: tutorial
+topics:
+  - SSH
+  - Authentication
+  - GitHub
+  - Security
+---
+
+# Step-by-Step: Setting Up SSH Authentication for GitHub
+
+This guide explains how to set up SSH and push code to GitHub step by step.
+
+## 1. Generate SSH Key
+
+Create a new SSH key for authentication.
+
+```bash
+ssh-keygen -t ed25519 -C "[email protected]"
+```
+
+Press Enter to save the key in the default location (~/.ssh/id_ed25519).
+
+Add a passphrase for extra security (optional).
+
+## 2. Add SSH Key to SSH Agent
+
+Start the SSH agent and add your private key for automatic authentication.
+
+```bash
+eval "$(ssh-agent -s)"      # Start the SSH agent
+ssh-add ~/.ssh/id_ed25519   # Add the private key
+```
+
+## 3. Copy Public Key
+
+Copy your public key to add it to GitHub.
+
+```bash
+cat ~/.ssh/id_ed25519.pub   # Show the public key
+```
+
+## 4. Add SSH Key to GitHub
+
+Go to GitHub: Settings > SSH and GPG Keys > New SSH Key.
+
+Paste your public key into the provided box and give it a title.
+
+## 5. Test SSH Connection
+
+Verify the connection to GitHub.
+
+```bash
+ssh -T [email protected]
+```
+
+You should see a message like: Hi username! You've successfully authenticated, but GitHub does not provide shell access.
+
+## 6. Set SSH URL for Existing Repository
+
+If the repository already exists and uses HTTPS, change it to SSH.
+
+```bash
+git remote set-url origin [email protected]:username/repository.git
+```
+
+## 7. Clone Repository (Optional)
+
+To download a repository using SSH:
+
+```bash
+git clone [email protected]:username/repository.git
+```
+
+## 8. Make Changes and Push
+
+Stage your changes:
+
+```bash
+git add .
+```
+
+Commit your changes with a message:
+
+```bash
+git commit -m "Your commit message"
+```
+
+Push the changes to GitHub:
+
+```bash
+git push origin main
+```