Comment by cholmon

If you have a lot of hosts listed in your ~/.ssh/config file, you can keep the file from getting too cluttered by using the Include directive, which supports wildcards...

    # in ~/.ssh/config
    Include config.d/*.conf

    # in ~/.ssh/config.d/work.conf
    host work
        hostname myoffice.example.com
        user myuser

    # in ~/.ssh/config.d/client1.conf
    host client1.dev
        hostname dev.client.example.net
        user someuser
    
    host client1.prod
        hostname prod.client.example.net
        user someuser