apt-get安装-g grunt grunt-cli缺少模块

Question

我正在使用Ubuntu14.04服务器，并试图使用以下命令安装grunt & grunt-cli：

npm install -g grunt grunt-cli

一切看起来都很好，没有错误被接收。但是，当我运行标准的咕噜命令时，我会收到以下错误：

module.js:338
throw err;
      ^
Error: Cannot find module 'eventemitter2'
at Function.Module._resolveFilename (module.js:336:15)
at Function.Module._load (module.js:278:25)
at Module.require (module.js:365:17)
at require (module.js:384:17)
at Object.<anonymous> (/var/www/html/unsplit/node_modules/grunt/lib/grunt/event.js:13:21)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Module.require (module.js:365:17)
at require (module.js:384:17)
at gRequire (/var/www/html/unsplit/node_modules/grunt/lib/grunt.js:23:24)
at Object.<anonymous>  (/var/www/html/unsplit/node_modules/grunt/lib/grunt.js:35:1)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Module.require (module.js:365:17)
at require (module.js:384:17)
at Object.<anonymous> (/usr/local/lib/node_modules/grunt-cli/bin/grunt:45:1)
at Module._compile (module.js:460:26)
at Object.Module._extensions..js (module.js:478:10)
at Module.load (module.js:355:32)
at Function.Module._load (module.js:310:12)
at Function.Module.runMain (module.js:501:10)
at startup (node.js:129:16)
at node.js:814:3`

什么会导致这种情况发生？

Answer 1

因为一些奇怪的原因，有一次我跑了：npm remove -g grunt grunt-cli

并重新运行：npm install -g grunt grunt-cli

一切都正常！