nasser@nasser-desktop:~/projects/server v3$ npm install simple-proxy
npm WARN package.json docco@0.6.2 No repository field.
npm http GET https://registry.npmjs.org/simple-proxy
npm http GET https://registry.npmjs.org/simple-proxy
npm http GET https://registry.npmjs.org/simple-proxy
npm ERR! network socket hang up
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 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! System Linux 3.5.0-17-generic
npm ERR! command "/usr/bin/node" "/usr/bin/npm" "install" "simple-proxy"
npm ERR! cwd /home/nasser/projects/serverV3
npm ERR! node -v v0.10.18
npm ERR! npm -v 1.3.8
npm ERR! code ECONNRESET
npm ERR!
npm ERR! Additional logging details can be found in:
npm ERR! /home/nasser/projects/serverV3/npm-debug.log
npm ERR! not ok code 0
解决方法：
清除掉以前的代理设置
npm config set proxy null
npm config set https-proxy null
也可以先通过以下代码查看代理设置，如果返回null那就不需要清理
npm config get proxy
npm config get https-proxy
重新配置
npm config set registry http://registry.npmjs.org/