How to Configure Multiple SSH Keys for GitHub and Azure DevOps Repos

Recently, I've encountered situations where I need to work with multiple git repositories from different sources. This often includes interfacing with repositories on both GitHub and Azure DevOps. Without the proper setup, I encounter generic errors in git, especially when trying to clone new repositories.

I primarily use SSH keys to manage authentication with these services. To streamline the process, it's useful to configure the ~/.ssh/config file to point each host to the appropriate key. Below is an example that you can use for your own configuration.

Host github.com
    AddKeysToAgent yes
    UseKeychain yes # mac only
    IdentityFile ~/.ssh/github
    HostName github.com

Host bitbucket.org
    AddKeysToAgent yes
    UseKeychain yes # mac only
    IdentityFile ~/.ssh/bitbucket
    HostName bitbucket.org

Host vs-ssh.visualstudio.com
    AddKeysToAgent yes
    UseKeychain yes # mac only
    IdentityFile ~/.ssh/your-azure-devops
    HostName vs-ssh.visualstudio.com
    IdentitiesOnly yes
    PubkeyAcceptedAlgorithms +ssh-rsa
    HostkeyAlgorithms +ssh-rsa
    Host ssh.dev.azure.com

HostName ssh.dev.azure.com
    User git
    AddKeysToAgent yes
    UseKeychain yes # mac only
    IdentityFile ~/.ssh/your-azure-devops
    IdentitiesOnly yes
    PubkeyAcceptedAlgorithms +ssh-rsa
    HostkeyAlgorithms +ssh-rsa

Enjoy!