1 sudo apt-get install git-core
2 sudo apt-get install git sudo apt-get install nodejs sudo apt-get install npm
3 npm install -g hexo-cli
换源
npm config set registry https://registry.npm.taobao.org
安装
sudo npm install --unsafe-perm --verbose -g hexo
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最后搜了好久在stackoverflow上找到的答案
npm config set proxy false
npm cache clean
执行这两行即可，效果是清楚代理和缓存