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December 20, 2024 19:22
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Save quantumchuckles/0f669a478d0954fc4a2df1eabb17a9ab to your computer and use it in GitHub Desktop.
This script sets up SSH keys for GitHub authentication and configures Git to sign commits and tags with those keys. It cleans up old SSH, GPG, and Git configurations, then generates new keys and updates Git settings.
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| # Part 1: Cleanup | |
| # List the contents of the SSH directory | |
| ls -l ~/.ssh | |
| # Remove existing SSH keys and configuration | |
| rm -rf ~/.ssh | |
| # Create a new SSH directory | |
| mkdir ~/.ssh | |
| # Set permissions for the SSH directory to 700 (read/write/execute for owner) | |
| chmod 700 ~/.ssh | |
| # List SSH keys currently added to the SSH agent | |
| ssh-add -l | |
| # Remove all SSH keys from the agent | |
| ssh-add -D | |
| # Remove the GPG configuration directory | |
| rm -rf ~/.gnupg | |
| # List global git configuration settings | |
| git config --global --list | |
| # Remove the existing global git configuration file | |
| rm -rf ~/.gitconfig | |
| # Create an empty git configuration file | |
| touch ~/.gitconfig | |
| # Part 2: SSH Key Generation and Setup | |
| # Generate a new SSH key pair with ED25519 algorithm | |
| ssh-keygen -t ed25519 -C "[email protected]" | |
| # Start the SSH agent | |
| eval "$(ssh-agent -s)" | |
| # Add the generated SSH private key to the agent | |
| ssh-add ~/.ssh/id_ed25519 | |
| # Output the public key to copy for GitHub | |
| cat ~/.ssh/id_ed25519.pub | |
| # Log in to GitHub, go to Settings > SSH and GPG keys, then add the public key. | |
| # Make 2 keys: one for authentication and another for signing, using the same public key for both and give them the same title. | |
| # Edit SSH configuration for GitHub | |
| echo -e "Host github.com\n HostName github.com\n User git\n IdentityFile ~/.ssh/id_ed25519" > ~/.ssh/config | |
| # Adding GitHub's SSH key to known_hosts... | |
| ssh-keyscan github.com >> ~/.ssh/known_hosts | |
| # Test SSH connection to GitHub | |
| ssh -T [email protected] | |
| # Part 3: Git Global Configuration and GPG Signing | |
| # Set global Git user name and email | |
| git config --global user.name "[email protected]" | |
| git config --global user.email "your_username" | |
| # Enable GPG signing for commits | |
| git config --global commit.gpgSign true | |
| # Enable GPG signing for tags | |
| git config --global tag.gpgSign true | |
| # Set GPG format to SSH | |
| git config --global gpg.format ssh | |
| # Set the SSH public key for signing | |
| git config --global user.signingkey ~/.ssh/id_ed25519.pub | |
| # Add the signing key to GPG's allowed signers list | |
| echo "$(git config --get user.email) namespaces=\"git\" $(cat ~/.ssh/id_ed25519.pub)" >> ~/.gnupg/allowed_signers | |
| # Set the allowed signers file for GPG | |
| git config --global gpg.ssh.allowedSignersFile ~/.gnupg/allowed_signers |
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