Ruby Rails - Cloud9 - (SocketError)

Question

When trying to start my Rails app in C9.io, I see the Socket Error below. I am unsure how to correct this issue. Any ideas?

• ruby 2.3.0p0 (2015-12-25 revision 53290) [x86_64-linux]
• Rails 4.2.5

• Cloud9 IDE

   blacknight659:~/jh_projects/mybay2 $ rails s -b -$IP -p -$PORT

  => Booting WEBrick => Rails 4.2.5 application starting in development on http://-0.0.0.0:-8080 => Run rails server -h for more startup options => Ctrl-C to shutdown server [2016-07-26 17:43:06] INFO WEBrick 1.3.1 [2016-07-26 17:43:06] INFO ruby 2.3.0 (2015-12-25) [x86_64-linux] Exiting /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/socket.rb:231:in getaddrinfo': getaddrinfo: Servname not supported for ai_socktype (SocketError) from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/socket.rb:231:in foreach' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/socket.rb:757:in tcp_server_sockets' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/webrick/utils.rb:65:in create_listeners' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/webrick/server.rb:134:in listen' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/webrick/server.rb:115:in initialize' from /usr/local/rvm/rubies/ruby-2.3.0/lib/ruby/2.3.0/webrick/httpserver.rb:47:in initialize' from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/handler/webrick.rb:31:in initialize' from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/handler/webrick.rb:31:in new' from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/handler/webrick.rb:31:in run' from /usr/local/rvm/gems/ruby-2.3.0/gems/rack-1.6.4/lib/rack/server.rb:286:in start' from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/server.rb:80:in start' from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:80:in block in server' from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in tap' from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in server' from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in run_command!' from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands.rb:17:in run_command!' from /usr/local/rvm/gems/ruby-2.3.0/gems/railties-4.2.5/lib/rails/commands.rb:17:in ' from /home/ubuntu/jh_projects/mybay2/bin/rails:9:in require' from /home/ubuntu/jh_projects/mybay2/bin/rails:9:in ' from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in load' from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/rails.rb:28:in call' from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client/command.rb:7:in call' from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/client.rb:30:in run' from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/bin/spring:49:in <top (required)>' from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in load' from /usr/local/rvm/gems/ruby-2.3.0/gems/spring-1.7.2/lib/spring/binstub.rb:11:in <top (required)>' from /home/ubuntu/jh_projects/mybay2/bin/spring:13:in require' from /home/ubuntu/jh_projects/mybay2/bin/spring:13:in <top (required)>' from bin/rails:3:in l oad' from bin/rails:3:in `'

Answer 1

I got the same error when tried to start my Sinatra app on cloud9. It turned out that I was running the command : $ bundle exec rackup -p $PORT -o $IP with root user (su). Try to run it on normal user.

Answer 2

You have a dash before ip and port arguments. The values of the arguments are specified without dashes. Try:

rails s -b $IP -p $PORT