我尝试使用 npm 安装 grunt，但出错了，但没有详细说明推理。在这里重现日志。
npm -v
1.1.4
sudo npm install -g grunt-cli
npm http GET https://registry.npmjs.org/grunt-cli
npm ERR! Error: failed to fetch from registry: grunt-cli
npm ERR! at /usr/share/npm/lib/utils/npm-registry-client/get.js:139:12
npm ERR! at cb (/usr/share/npm/lib/utils/npm-registry-client/request.js:31:9)
npm ERR! at Request._callback (/usr/share/npm/lib/utils/npm-registry-client/request.js:136:18)
npm ERR! at Request.callback (/usr/lib/nodejs/request/main.js:119:22)
npm ERR! at Request.<anonymous> (/usr/lib/nodejs/request/main.js:212:58)
npm ERR! at Request.emit (events.js:88:20)
npm ERR! at ClientRequest.<anonymous> (/usr/lib/nodejs/request/main.js:412:12)
npm ERR! at ClientRequest.g (events.js:156:14)
npm ERR! at ClientRequest.emit (events.js:67:17)
npm ERR! at HTTPParser.parserOnIncomingClient [as onIncoming] (http.js:1256:7)
npm ERR! You may …