npm和yarn都不能使用

Question

一、使用yarn
1、安装好后更换淘宝镜像

yarn config set registry https://registry.npm.taobao.org

2、使用yarn进行包的安装，出现如下错误：

$ yarn install
yarn install v1.3.2
info No lockfile found.
[1/4] Resolving packages...
[2/4] Fetching packages...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...
info There appears to be trouble with your network connection. Retrying...

二、使用npm
1、安装好node.js 8.9.3后更换国内镜像
更换方法：在电脑个人用户目录下的新建.npmrc文件，写入下面内容：

registry=http://registry.cnpmjs.org/
sass_binary_site=https://npm.taobao.org/mirrors/node-sass/

2、使用npm进行包的安装，下面卡死了

PS D:\wnmp\www\myproject> npm install
[ .................] - fetchMetadata: sill pacote range manifest for lodash.escape@^3.0.0 fetched in 203ms

问题：
npm和yarn都不能使用，哪里没有设置正确？

Answer 1

npm用淘宝源，cnpmjs也是在国外的

Answer 2

1. 全局安装nrm: npm install nrm -g;
2. 查看镜像源: nrm ls;
3. 切换镜像源: nrm use taobao; // 我用的淘宝
4. 安装需要的模块: npm install <package-name>;
5. 如果需要安装全部依赖: npm install;

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