nrm ---npm包的镜像管理

// 全局 管理npm源

npm i -g nrm 

$ nrm ls 

* npm ---- https://registry.npmjs.org/
  cnpm --- http://r.cnpmjs.org/
  taobao - https://registry.npm.taobao.org/
  nj ----- https://registry.nodejitsu.com/
  rednpm - http://registry.mirror.cqupt.edu.cn/
  npmMirror  https://skimdb.npmjs.com/registry/
  edunpm - http://registry.enpmjs.org/

$ nrm -h

Options:
  -V, --version                output the version number
  -h, --help                   output usage information

Commands:
  ls                           List all the registries
  current                      Show current registry name
  use <registry>               Change registry to registry
  add <registry> <url> [home]  Add one custom registry
  del <registry>               Delete one custom registry
  home <registry> [browser]    Open the homepage of registry with optional browser
  test [registry]              Show response time for specific or all registries
  help                         Print this help

// 切换到淘宝镜像
nrm use taobao