npm中npm install 始终出错解决办法
错误信息：
C:\Windows\System32>npm install -g gulp
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” “-g” "gulp"
npm ERR! node v0.12.2 npm ERR!
npm v2.7.4 npm ERR! code ECONNRESET
npm ERR! network tunneling socket could not be established, cause=connect ETIMED OUT
npm ERR! network This is most likely not a problem with npm itself
npm ERR! network and is related to network connectivity.
npm ERR! network In most cases you are behind a proxy or have bad network settin gs.
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! Please include the following file with any support request:
npm ERR! C:\Windows\System32\npm-debug.log
问题原因：
npm代理设置错误，从新设置代理即可。
解决办法：
$ npm config set registry "http://registry.npmjs.org/"