紅寶石軌服務器無法啓動時，我在正確的目錄

Question

我不是enirly知道爲什麼，但使用命令軌開始只是爲了顯示所有的郵件目錄中的文件都在那裏

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

真正的問題是，每當我用

rails server 

它pukes出來的垃圾和上件事我明白這一切的是 uglifier出現錯誤。任何人都知道一個修復> 它可能是運行時沒有安裝，但我不完全確定。它需要我補充細節，這就是爲什麼我的問題是拖上

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這麼多的空間）

Answer 1

如果你通過你的錯誤信息讀取它說，你需要安裝一個JavaScript運行。

如果使用的Debain/Ubuntu的你可以sudo apt-get install nodejs安裝節點

參見：Rails - Could not find a JavaScript runtime?

Answer 2

您必須在系統中安裝修復的Javascript運行時錯誤上的node.js。

在OSX：

brew install nodejs 

如果您在Ubuntu上只運行：

sudo apt-get install nodejs 

，然後運行您的服務器，導軌秒。