    # File lib/fog/aws/models/compute/server.rb, line 191
            def setup(credentials = {})
              requires :public_ip_address, :username
              require 'net/ssh'

              commands = [
                %{mkdir .ssh},
                %{passwd -l #{username}},
                %{echo "#{Fog::JSON.encode(Fog::JSON.sanitize(attributes))}" >> ~/attributes.json}
              ]
              if public_key
                commands << %{echo "#{public_key}" >> ~/.ssh/authorized_keys}
              end

              # wait for aws to be ready
              wait_for { sshable? }

              Fog::SSH.new(public_ip_address, username, credentials).run(commands)
            end