目前使用ionic+cordova完成hybmid app开发，在安装geolocation插件时爆出来一个莫名的错误：
Fetching from npm failed: CERT_UNTRUSTED
Error: CERT_UNTRUSTED
at SecurePair.<anonymous> (tls.js:1367:32)
at SecurePair.emit (events.js:92:17)
at SecurePair.maybeInitFinished (tls.js:979:10)
at CleartextStream.read [as _read] (tls.js:471:13)
at CleartextStream.Readable.read (_stream_readable.js:340:10)
at EncryptedStream.write [as _write] (tls.js:368:25)
at doWrite (_stream_writable.js:225:10)
at writeOrBuffer (_stream_writable.js:215:5)
at EncryptedStream.Writable.write (_stream_writable.js:182:11)
at write (_stream_readable.js:601:24)
原因是因为我自己重新设置了npm仓库为淘宝的npm镜像仓库，由于某些安全原因无法获取cordova的相关插件，解决办法很简单：
npm config set strict-ssl false
以上。
cordova plugin add出现CERT_UNTRUSTED错误解决方法
原文：http://www.cnblogs.com/accordion/p/4539241.html