module.js:328
 
    throw err;
 
    ^
 
Error: Cannot find module 'npmlog'
 
    at Function.Module._resolveFilename (module.js:326:15)
 
    at Function.Module._load (module.js:277:25)
 
    at Module.require (module.js:354:17)
 
    at require (internal/module.js:12:17)
 
    at /usr/local/lib/node_modules/npm/bin/npm-cli.js:20:13
 
    at Object.<anonymous> (/usr/local/lib/node_modules/npm/bin/npm-cli.js:76:3)
 
    at Module._compile (module.js:398:26)
 
    at Object.Module._extensions..js (module.js:405:10)
 
    at Module.load (module.js:344:32)
 
    at Function.Module._load (module.js:301:12)

解决办法：
重新安装NPM，成功解决！

解决： curl -0 -L http://npmjs.org/install.sh | sudo sh