ruby rails server not starting when i use command rails start in the correct directory

Question

Im not enirly sure why but just to show that all the mail directory files are in there

$ ls
app     config.ru  Gemfile.lock  package.json  README.md  vendor
bin     db         lib           public        test
config  Gemfile    log           Rakefile      tmp

real problem is whenever I use

rails server

it pukes out garbage and the on thing I do understand of all of it is that uglifier had an error. anyone know a fix> It could aslo be that runtime isnt installed but Im not entirely sure about that. It needs me to add details to this thats why my question is dragging on

rails aborted!
Bundler::GemRequireError: There was an error while trying to load the 
gem 'uglifier'.
Gem Load Error is: Could not find a JavaScript runtime. See 
https://github.com/rails/execjs for a list of available runtimes.
Backtrace for gem load error is:
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/execjs-
2.7.0/lib/execjs/runtimes.rb:58:in `autodetect'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/execjs-
2.7.0/lib/execjs.rb:5:in `<module:ExecJS>'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/execjs-
2.7.0/lib/execjs.rb:4:in `<top (required)>'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/uglifier-
3.2.0/lib/uglifier.rb:5:in `require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/uglifier-
3.2.0/lib/uglifier.rb:5:in `<top (required)>'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:83:in `require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:83:in `block (2 levels) in 
require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:78:in `each'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:78:in `block in require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:67:in `each'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:67:in `require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler.rb:114:in `require'
/home/hyperlisk/readit/config/application.rb:7:in `<top (required)>'
/home/hyperlisk/readit/Rakefile:4:in `require_relative'
/home/hyperlisk/readit/Rakefile:4:in `<top (required)>'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/rake-
12.2.1/lib/rake/rake_module.rb:29:in `load'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/rake-
12.2.1/lib/rake/rake_module.rb:29:in `load_rakefile'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/rake-
12.2.1/lib/rake/application.rb:703:in `raw_load_rakefile'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/rake-
12.2.1/lib/rake/application.rb:104:in `block in load_rakefile'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/rake-
12.2.1/lib/rake/application.rb:186:in `standard_exception_handling'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/rake-
12.2.1/lib/rake/application.rb:103:in `load_rakefile'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/commands/rake/rake_command.rb:20:in `block in perform'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/rake-
12.2.1/lib/rake/application.rb:186:in `standard_exception_handling'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/commands/rake/rake_command.rb:18:in `perform'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/command.rb:46:in `invoke'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/commands.rb:16:in `<top (required)>'
bin/rails:4:in `require'
bin/rails:4:in `<main>'
Bundler Error Backtrace:
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:86:in `rescue in block (2 levels) 
in require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:82:in `block (2 levels) in 
require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:78:in `each'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:78:in `block in require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:67:in `each'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:67:in `require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler.rb:114:in `require'
/home/hyperlisk/readit/config/application.rb:7:in `<top (required)>'
/home/hyperlisk/readit/Rakefile:4:in `require_relative'
/home/hyperlisk/readit/Rakefile:4:in `<top (required)>'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/commands/rake/rake_command.rb:20:in `block in perform'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/commands/rake/rake_command.rb:18:in `perform'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/command.rb:46:in `invoke'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/commands.rb:16:in `<top (required)>'
bin/rails:4:in `require'
bin/rails:4:in `<main>'

Caused by:
ExecJS::RuntimeUnavailable: Could not find a JavaScript runtime. See 
https://github.com/rails/execjs for a list of available runtimes.
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/execjs-
2.7.0/lib/execjs/runtimes.rb:58:in `autodetect'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/execjs-
2.7.0/lib/execjs.rb:5:in 
`<module:ExecJS>'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/execjs-
2.7.0/lib/execjs.rb:4:in 
`<top (required)>'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/uglifier-
3.2.0/lib/uglifier.rb:5:in `require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/uglifier-
3.2.0/lib/uglifier.rb:5:in `<top (required)>'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:83:in `require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:83:in `block (2 levels) in 
require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:78:in `each'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:78:in `block in require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:67:in `each'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler/runtime.rb:67:in `require'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/bundler-
1.16.0.pre.3/lib/bundler.rb:114:in `require'
/home/hyperlisk/readit/config/application.rb:7:in `<top (required)>'
/home/hyperlisk/readit/Rakefile:4:in `require_relative'
/home/hyperlisk/readit/Rakefile:4:in `<top (required)>'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/commands/rake/rake_command.rb:20:in `block in perform'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/commands/rake/rake_command.rb:18:in `perform'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/command.rb:46:in `invoke'
/home/hyperlisk/.rvm/gems/ruby-2.4.1/gems/railties-
5.1.4/lib/rails/commands.rb:16:in `<top (required)>'
bin/rails:4:in `require'
bin/rails:4:in `<main>'
(See full trace by running task with --trace)

(OMFG SO MANY SPACES)

Possible duplicate of https://stackoverflow.com/questions/41329995/could-not-find-a-javascript-runtime-how-do-i-install-one — Naren Sisodiya, Oct 29 '17 at 01:57
Possible duplicate of [Rails - Could not find a JavaScript runtime?](https://stackoverflow.com/questions/7092107/rails-could-not-find-a-javascript-runtime) — Naren Sisodiya, Oct 29 '17 at 01:59

score 1 · Answer 1 · answered Oct 29 '17 at 02:00

1

You will have to have node.js installed on your system to fix the Javascript runtime error.

On OSX:

brew install nodejs

if your on Ubuntu just run:

sudo apt-get install nodejs

and then run your server, rails s.

answered Oct 29 '17 at 02:00

MisterCal

622
2
7
22

score 0 · Answer 2 · answered Oct 29 '17 at 01:59

0

If you read through your error message it says that you need to install a JavaScript Runtime.

If using debain/ubuntu you can sudo apt-get install nodejs to install Node

See: Rails - Could not find a JavaScript runtime?

answered Oct 29 '17 at 01:59

Andy

720
1
7
13

ruby rails server not starting when i use command rails start in the correct directory

2 Answers2