Error starting "Rails Server"

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Hi I’m trying to install Ruby on Rails on Ubuntu and startar the server using the command

rails server

returns me the following error.

felipe@Dumont:~/mo$ rails server
/home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/execjs-2.1.0/lib/execjs/runtimes.rb:51:in `autodetect': Could not find a JavaScript runtime. See https://github.com/sstephenson/execjs for a list of available runtimes. (ExecJS::RuntimeUnavailable)
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/execjs-2.1.0/lib/execjs.rb:5:in `<module:ExecJS>'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/execjs-2.1.0/lib/execjs.rb:4:in `<top (required)>'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/uglifier-2.5.0/lib/uglifier.rb:3:in `require'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/uglifier-2.5.0/lib/uglifier.rb:3:in `<top (required)>'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.6.2/lib/bundler/runtime.rb:76:in `require'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.6.2/lib/bundler/runtime.rb:76:in `block (2 levels) in require'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.6.2/lib/bundler/runtime.rb:72:in `each'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.6.2/lib/bundler/runtime.rb:72:in `block in require'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.6.2/lib/bundler/runtime.rb:61:in `each'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.6.2/lib/bundler/runtime.rb:61:in `require'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/bundler-1.6.2/lib/bundler.rb:132:in `require'
    from /home/felipe/mo/config/application.rb:7:in `<top (required)>'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:79:in `require'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:79:in `block in server'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:76:in `tap'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:76:in `server'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/railties-4.1.1/lib/rails/commands.rb:17:in `<top (required)>'
    from /home/felipe/mo/bin/rails:8:in `require'
    from /home/felipe/mo/bin/rails:8:in `<top (required)>'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `load'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/spring-1.1.3/lib/spring/client/rails.rb:27:in `call'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/spring-1.1.3/lib/spring/client/command.rb:7:in `call'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/spring-1.1.3/lib/spring/client.rb:26:in `run'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/spring-1.1.3/bin/spring:48:in `<top (required)>'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `load'
    from /home/felipe/.rvm/gems/ruby-2.0.0-p481/gems/spring-1.1.3/lib/spring/binstub.rb:11:in `<top (required)>'
    from /home/felipe/mo/bin/spring:16:in `require'
    from /home/felipe/mo/bin/spring:16:in `<top (required)>'
    from bin/rails:3:in `load'
    from bin/rails:3:in `<main>'

Could someone please let me know a solution to this problem? I’m a new Linux user.

ruby-on-rails ruby

  • Dude I also advise you to use Nodejs: sudo apt-get install nodejs

2 answers

2


First open your terminal and access the folder of your project and gives a bundle install or installs the gem install uglifier. Besides that Rails needs Nodejs installed on the machine to run the javascript engine, with the command sudo apt-get install nodejs

1

Certain actions that Rails does require a Javascript engine to be installed on the operating system. This includes compiling files Coffeescript and Sass, for example.

  • Try to install the The Ruby Racer adding gem "therubyracer", platforms: :ruby in your Gemfile and run bundle install

  • If it doesn’t work try to install the Nodejs: sudo apt-get install nodejs

  • 2

    It is recommended to use nodejs, the ruby racer has a series of the problems.

  • I believe that the best option is to install the nodejs anyway! Already not to have these future problems!

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