# File lib/phusion_passenger/config/list_instances_command.rb, line 37
        def run
                parse_options
                server_instances = AdminTools::ServerInstance.list
                if @options[:json]
                        print_json(server_instances)
                elsif server_instances.empty?
                        print_no_instances_running
                else
                        print_instances(server_instances)
                end
        end