Contributing with Different GitHub Accounts on the Same Device

Problem Statement

I have two different GitHub accounts: my work account and my personal account. I want to be able to contribute to my personal Quartz repository from my work laptop. To do this, I need to setup two separate GitHub accounts within my ssh/git configuration on my work local machine.

The Goal

• My work laptop uses xxx.githubenterprise.com for your work account.
• I want to push to a private personal GitHub repo (Quartz) on github.com without interfering with work Git.
• I want my commits to be under my personal GitHub identity for the Quartz repo.
• I want to keep the Quartz repo private and editable from both devices.

The Solution

1. First, generate a new SSH key pair on your work laptop for your personal GitHub.

   ssh-keygen -t ed25519 -C "your_personal_email@example.com"
    # Save as: ~/.ssh/id_ed25519_personal

2. Then, add this key to your ~/.ssh/config.

   # ~/.ssh/config
    
   # Personal GitHub
   Host github.com-personal
     HostName github.com
     User git
     IdentityFile ~/.ssh/id_ed25519_personal
     IdentitiesOnly yes		

3. Then add your public key (~/.ssh/id_ed25519_personal.pub) to your personal GitHub account under: > GitHub → Settings → SSH and GPG Keys → New SSH Key
4. Clone the Quartz Repo Using the Custom Host.

   git clone git@github.com-personal:yourusername/quartz.git ~/quartz
    cd ~/quartz

5. Configure Git Locally for the Quartz Repo

   git config user.name "Your Name"
    git config user.email "your_personal_email@example.com"
    
    # verification within repo
    git config --get user.email
    git config --get user.name

6. Set Remote URL to Avoid Mistakes

   git remote set-url origin git@github.com-personal:yourusername/quartz.git

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