Using Github with two accounts

Instructions

1. Create a new, separate key for each github account

   follows this tutorial: https://docs.github.com/en/authentication/connecting-to-github-with-ssh/generating-a-new-ssh-key-and-adding-it-to-the-ssh-agent

   ssh-keygen -t ed25519 -C "your_email@example.com"
   

   and follow the prompts. USE A PASSPHRASE. Or do it in one line, with filename and passphrase supplied

   ssh-keygen -t ed25519 -C "user1_email@corporate.com" -f /the/path/to/user1_github_key -N my_passphrase_here
   ssh-keygen -t ed25519 -C "user2_email@personal.com" -f /the/path/to/user2_github_key -N my_passphrase_here
   

2. Add each key to each github account

   Uses: https://help.github.com/articles/adding-a-new-ssh-key-to-your-github-account/

   1. Log in
   2. Go to profile-->settings-->"SSH and GPG keys"-->"Add New"
   3. Give it a name (like the filename you created) and paste in the public key
   4. Repeat adding each key to each github account

3. Create/edit your ~/.ssh/config file

   Note: I have the following settings at the top of my config file to make it more secure:

   AddKeysToAgent yes
   
   Host *
      IdentitiesOnly yes
      PreferredAuthentications publickey 
      #...and other settings
   

   Then I add the following. To ensure the gitman package is setup correctly, make sure user1 and user2 are your actual github usernames

   Host user1.github.com
      HostName github.com
      User git
      IdentityFile /the/path/to/user1_github_key
   
   Host user2.github.com
      HostName github.com
      User git
      IdentityFile ~/the/path/to/user2_github_key
   

External References:

• https://www.freecodecamp.org/news/manage-multiple-github-accounts-the-ssh-way-2dadc30ccaca
• https://gist.github.com/oanhnn/80a89405ab9023894df7
• https://jeffbrown.tech/multiple-github-accounts-ssh/
• https://www.section.io/engineering-education/using-multiple-ssh-keys-for-multiple-github-accounts/
• https://stackoverflow.com/questions/3225862/multiple-github-accounts-ssh-config