红宝石轨服务器无法启动时，我在正确的目录

Question

我不是enirly知道为什么，但使用命令轨开始只是为了显示所有的邮件目录中的文件都在那里

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

真正的问题是，每当我用

rails server 

它pukes出来的垃圾和上件事我明白这一切的是 uglifier出现错误。任何人都知道一个修复> 它可能是运行时没有安装，但我不完全确定。它需要我补充细节，这就是为什么我的问题是拖上

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这么多的空间）

Answer 1

如果你通过你的错误信息读取它说，你需要安装一个JavaScript运行。

如果使用的Debain/Ubuntu的你可以sudo apt-get install nodejs安装节点

参见：Rails - Could not find a JavaScript runtime?

Answer 2

您必须在系统中安装修复的Javascript运行时错误上的node.js。

在OSX：

brew install nodejs 

如果您在Ubuntu上只运行：

sudo apt-get install nodejs 

，然后运行您的服务器，导轨秒。