最近使用npm install總是報錯

npm ERR! Windows_NT 10.0.14393  
npm ERR! argv "C:\\Program Files\\nodejs\\node.exe" "C:\\Program Files\\nodejs\\node_modules\\npm\\bin\\npm-cli.js" "update" "npm"  
npm ERR! node v6.2.0  
npm ERR! npm  v2.14.19  
  
npm ERR! shasum check failed for C:\Users\kuaima\AppData\Local\Temp\npm-18136-7181dc7d\registry.npmjs.org\npm\-\npm-4.0.5.tgz  
npm ERR! Expected: a9c3c00c3c5bd6b0538c71109e019afd9d5b1403  
npm ERR! Actual:   229ee9303b213d8ad584a6d4f65b971874d5b0e9  
npm ERR! From:     https://registry.npmjs.org/npm/-/npm-4.0.5.tgz  
npm ERR!  
npm ERR! If you need help, you may report this error at:  
npm ERR!     <https://github.com/npm/npm/issues>  
  
npm ERR! Please include the following file with any support request:  
npm ERR!     C:\Program Files\nodejs\npm-debug.log 
 

原因是node環境沒有做好，需要手動配置環境變數，計算機 => 系統屬性  => 高階系統設定 => 環境變數 => 新增

變數:PATH,值C:\Program Files\nodejs;C:\Users\asus\AppData\Roaming\npm

變數:NODE_PATH,值C:\Program Files\nodejs\node_modules

更新後需要重啟才能起作用，也可以安裝新版node，安裝時選擇ADD TO PATH選項，就不必自己手動配置環境變量了