Error starting "Rails Server"

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Hello, I'm trying to install Ruby on Rails on Ubuntu and start the server using the 

rails server

I get 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 anyone tell me a solution to this problem? I'm a novice user on Linux.

    
asked by anonymous 05.06.2014 / 04:27

2 answers

2

First open your terminal and access the folder of your project and give bundle install or install gem install uglifier . Note that rails require NodeJs installed on the machine to run the javascript engine, with the command sudo apt-get install nodejs

    
22.07.2014 / 21:27
1

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

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

  • If it does not work try installing the NodeJS : sudo apt-get install nodejs

05.06.2014 / 12:58
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