無法使用終端命令“rails s -b $IP -p $port”在cloud9中啟動rails服務器

Question

我無法在 cloud9 中啟動 rails 服務器。 我運行命令

rails s -b $IP -p $port

它給出了以下輸出

 /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/server.rb:12:in `parse!': invalid argument: -p -b (OptionParser::InvalidArgument)
        from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.8/lib/rack/server.rb:316:in `parse_options'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/rack-1.6.8/lib/rack/server.rb:191:in `options'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/server.rb:71:in `set_environment'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/server.rb:55:in `initialize'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `new'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:75:in `server'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/railties-4.2.5/lib/rails/commands.rb:17:in `<top (required)>'
        from /home/ubuntu/workspace/bin/rails:9:in `require'
        from /home/ubuntu/workspace/bin/rails:9:in `<top (required)>'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `load'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client/rails.rb:28:in `call'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client/command.rb:7:in `call'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/client.rb:30:in `run'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/bin/spring:49:in `<top (required)>'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `load'
        from /usr/local/rvm/gems/ruby-2.3.4/gems/spring-2.0.2/lib/spring/binstub.rb:31:in `<top (required)>'
        from /home/ubuntu/workspace/bin/spring:15:in `require'
        from /home/ubuntu/workspace/bin/spring:15:in `<top (required)>'
        from bin/rails:3:in `load'
        from bin/rails:3:in `<main>'

Answer 1

這將是server或s不-s像下面

rails server -b $IP -p $PORT

或者

rails s -b $IP -p $PORT

Answer 2

我從另一個論壇得到了這個答案，它奏效了。 我剛剛將“$port”更改為“$PORT”。 我不確定是否是因為區分大小寫。