初次使用nodejs的问题

使用npm install -g 'xxx' 之后仍然报 
Cannot find module 'xxx' 错误，可以通过设置环境变量来解决； 

export NODE_PATH=/usr/local/lib/node_modules/
echo $NODE_PATH

使用socket.io出现问题，按照demo使用<script src='http://localhost:2013/socket.io/socket.io.js'></script>出现错误：

"io is not defined" 

将上述代码修改为：

<script src='socket.io/socket.io.js'></script>即可解决该问题。

如果将上述的src直接使用本机的socket.io的地址或者cdn的公开socket.io会出现

info  - unhandled socket.io url.依旧不能使用

 

NPM安装模块出错

npm http GET https://registry.npmjs.org/supervisor

 

npm ERR! Error: failed to fetch from registry: supervisor

npm ERR!     at /usr/share/npm/lib/utils/npm-registry-client/get.js:139:12

npm ERR!     at cb (/usr/share/npm/lib/utils/npm-registry-client/request.js:31:9)

npm ERR!     at Request._callback (/usr/share/npm/lib/utils/npm-registry-client/request.js:136:18)

npm ERR!     at Request.callback (/usr/lib/nodejs/request/main.js:119:22)

npm ERR!     at Request.<anonymous> (/usr/lib/nodejs/request/main.js:212:58)

npm ERR!     at Request.emit (events.js:88:20)

npm ERR!     at ClientRequest.<anonymous> (/usr/lib/nodejs/request/main.js:209:10)

npm ERR!     at ClientRequest.emit (events.js:67:17)

npm ERR!     at ClientRequest.onError (/usr/lib/nodejs/request/tunnel.js:164:21)

npm ERR!     at ClientRequest.g (events.js:156:14)

npm ERR! You may report this log at:

npm ERR!     <http://bugs.debian.org/npm>

npm ERR! or use

npm ERR!     reportbug --attach /home/jon/npm-debug.log npm

npm ERR! 

npm ERR! System Linux 3.2.0-23-generic

npm ERR! command "node" "/usr/bin/npm" "install" "supervisor" "-g"

npm ERR! cwd /home/jon

npm ERR! node -v v0.6.12

npm ERR! npm -v 1.1.4

npm ERR! message failed to fetch from registry: supervisor

npm ERR! 

npm ERR! Additional logging details can be found in:

npm ERR!     /home/jon/npm-debug.log

npm not ok

 

 

 

解决方法：

npm config set registry http://registry.npmjs.org/