Error: Cannot find module '../lib/utils/unsupported.js'

重新安装node.js 后npm 被能使用（如下面）
是因为安装的node.js 9.9.0 不是稳定版本

sudo n stable //指定个稳定版本即可

module.js:545
throw err;
^

Error: Cannot find module ‘../lib/utils/unsupported.js’
at Function.Module._resolveFilename (module.js:543:15)
at Function.Module._load (module.js:470:25)
at Module.require (module.js:593:17)
at require (internal/module.js:11:18)
at /usr/local/lib/node_modules/npm/bin/npm-cli.js:19:21
at Object. (/usr/local/lib/node_modules/npm/bin/npm-cli.js:92:3)
at Module._compile (module.js:649:30)
at Object.Module._extensions..js (module.js:660:10)
at Module.load (module.js:561:32)
at tryModuleLoad (module.js:501:12)