使用npm安裝express時遇到304錯誤

ubuntu下用npm安裝express信息以下：

npm http GET https://registry.npmjs.org/express
npm http 304 https://registry.npmjs.org/express
npm http GET https://registry.npmjs.org/connect/2.7.0
npm http GET https://registry.npmjs.org/commander/0.6.1
npm http GET https://registry.npmjs.org/range-parser/0.0.4
npm http GET https://registry.npmjs.org/mkdirp/0.3.3
npm http GET https://registry.npmjs.org/cookie/0.0.5
npm http GET https://registry.npmjs.org/crc/0.2.0
npm http GET https://registry.npmjs.org/fresh/0.1.0
npm http GET https://registry.npmjs.org/methods/0.0.1
npm http GET https://registry.npmjs.org/send/0.1.0
npm http GET https://registry.npmjs.org/cookie-signature/0.0.1
npm http GET https://registry.npmjs.org/debug
npm http 304 https://registry.npmjs.org/connect/2.7.0
npm http 304 https://registry.npmjs.org/mkdirp/0.3.3
npm http 304 https://registry.npmjs.org/crc/0.2.0
npm http 304 https://registry.npmjs.org/fresh/0.1.0
npm http 304 https://registry.npmjs.org/methods/0.0.1
npm http 304 https://registry.npmjs.org/send/0.1.0
npm http 304 https://registry.npmjs.org/range-parser/0.0.4
npm http 304 https://registry.npmjs.org/commander/0.6.1
npm http 304 https://registry.npmjs.org/cookie-signature/0.0.1
npm http 304 https://registry.npmjs.org/debug
npm http 304 https://registry.npmjs.org/cookie/0.0.5
npm http GET https://registry.npmjs.org/mime/1.2.6
npm http GET https://registry.npmjs.org/qs/0.5.1
npm http GET https://registry.npmjs.org/formidable/1.0.11
npm http GET https://registry.npmjs.org/bytes/0.1.0
npm http GET https://registry.npmjs.org/pause/0.0.1
npm http 304 https://registry.npmjs.org/mime/1.2.6
npm http 304 https://registry.npmjs.org/qs/0.5.1
npm http 304 https://registry.npmjs.org/formidable/1.0.11
npm http 304 https://registry.npmjs.org/bytes/0.1.0
npm http 304 https://registry.npmjs.org/pause/0.0.1
/usr/local/bin/express -> /usr/local/lib/node_modules/express/bin/express
express@3.0.3 /usr/local/lib/node_modules/express 
├── methods@0.0.1
├── fresh@0.1.0
├── range-parser@0.0.4
├── cookie-signature@0.0.1
├── cookie@0.0.5
├── crc@0.2.0
├── commander@0.6.1
├── debug@0.7.0
├── mkdirp@0.3.3
├── send@0.1.0 (mime@1.2.6)
└── connect@2.7.0

結果就是命令行使用express不起做用

後來發現是node版本引發安裝錯誤，當初是使用apt-get從源裏直接安裝的，使用多版本管理器n安裝最新的node（0.8.14），再次 sudo npm install express -g搞定。

注：304   Not Modified 

Clients can make their requests conditional by the request headers
they include. This code indicates that the resource has not changed.