如何在代理后面安装 npm？答案

【问题标题】：How to install npm behind proxy?如何在代理后面安装 npm？
【发布时间】：2018-08-29 06:57:48
【问题描述】：

我阅读了有关此问题的所有内容，但没有一个有效。

我收到了npm ERR! code E418

或

npm ERR! network request to http://registry.npmjs.org/expo failed, reason
drinfo ENOTFOUND http http:80
npm ERR! network This is a problem related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network
gs.
npm ERR! network
npm ERR! network If you are behind a proxy, please make sure that the
npm ERR! network 'proxy' config is set properly.  See: 'npm help config'

我该如何解决这个问题？

【问题讨论】：

标签： react-native npm expo

【解决方案1】：

如果您知道代理信息：

$ npm config set proxy http://<username>:<password>@<proxy-server-url>:<port>
$ npm config set https-proxy http://<username>:<password>@<proxy-server-url>:<port>

【讨论】：