Due to some special reasons, package management software like npm, Yarn always downloads a bit slow in China. Can switch to Taobao registry, directly pull from domestic servers. Here’s a note:

NPM

npm config set registry https://registry.npm.taobao.org --global
npm config set disturl https://npm.taobao.org/dist --global

If the above configuration doesn’t work happily, can try the following method:

npm config set registry http://registry.cnpmjs.org
npm info underscore 
//(If above configuration is correct, this command will have string response)

yarn

yarn config set registry https://registry.npm.taobao.org --global
yarn config set disturl https://npm.taobao.org/dist --global

If EACCES: permission denied permission error appears, Fix /usr/local directory ownership:

sudo chown -R `whoami` /usr/local

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