npm源管理

1>下载nrm

npm i -g nrm(windows)
sudo npm i -g nrm (linux和mac)

2>使用nrm管理npm源

nrm使用：

Usage: cli [options] [command] 

Options: 

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

Commands: 

ls                                  List all the registries (显示npm源列表，有*号代表当前使用的源)
current                             Show current registry name (当前使用的npm源名称)
use  <registry>                     Change registry to registry (切换npm源)
add <registry> <url> [home]         Add one custom registry (添加npm源)
del <registry>                      Delete one custom registry )(删除npm源)
home <registry> [browser]           Open the homepage of registry with optional browser(在浏览器中打开输入源(名称)的域名)
test [registry]                     Show response time for specific or all registries 
help                                Print this help