最近重灌系統一切之後，在git上npm安裝報錯

npm ERR! code ETIMEDOUT
npm ERR! errno ETIMEDOUT
npm ERR! network request to https://registry.npmjs.org/hexo-generator-feed failed, reason: connect ETIMEDOUT 104.16.23.35:443
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 settings.
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'

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\Administrator\AppData\Roaming\npm-cache\_logs\2018
 
-07-24T16_30_05_726Z-debug.log

使用
npm install -g npm
然後就解決了，再安裝包沒有問題了。