F:\nodework\demo\day5>npm install ejs
npm ERR! fetch failed http://r.cnpmjs.org/ejs/download/ejs-2.5.6.tgz
npm WARN retry will retry, error on last attempt: Error: unable to verify the first certificate
npm ERR! fetch failed http://r.cnpmjs.org/ejs/download/ejs-2.5.6.tgz
npm WARN retry will retry, error on last attempt: Error: unable to verify the first certificate
npm ERR! fetch failed http://r.cnpmjs.org/ejs/download/ejs-2.5.6.tgz
npm ERR! Windows_NT 6.1.7601
npm ERR! argv "C:\Program Files\nodejs\node.exe" "C:\Program Files\nodejs\node_modules\npm\bin\npm-cli.js" "install" "ejs"
npm ERR! node v6.11.0
npm ERR! npm v3.10.10
npm ERR! code UNABLE_TO_VERIFY_LEAF_SIGNATURE
npm ERR! unable to verify the first certificate
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! F:\nodework\demo\day5\npm-debug.log
没安装node.js吧