ubuntu@ip-xxx-xx-x-xxx:/var/www/html$ npm install fs
npm WARN package.json crypto@0.0.3 crypto is also the name of a node core module.
npm WARN package.json filesystem@1.0.1 No description
npm WARN package.json http@0.0.0 http is also the name of a node core module.
npm WARN package.json http@0.0.0 No description
npm WARN package.json http@0.0.0 No repository field.
npm WARN package.json js@0.1.0 No repository field.

npm WARN package.json querystring@0.2.0 querystring is also the name of a node core module.
    npm WARN package.json url@0.10.1 url is also the name of a node core module.
    npm WARN package.json util@0.10.3 util is also the name of a node core module.
    npm ERR! 404 Not Found
    npm ERR! 404 
    npm ERR! 404 'fs' is not in the npm registry.
    npm ERR! 404 You should bug the author to publish it
    npm ERR! 404 
    npm ERR! 404 Note that you can also install from a
    npm ERR! 404 tarball, folder, or http url, or git url.

npm错误！系统Linux 3.13.0-24-通用npm错误！命令“/usr/local/bin/node”“/usr/local/bin/npm”“install”“fs”npm错误！cwd/VAR/WWW/HTML npm错误！节点-V V0.10.29 npm错误！NPM-V 1.4.14 npm错误！代码E404 npm错误！错误：EACCES，打开'npm-debug.log'npm错误！{[错误：EACCES,打开“npm-debug.log”]错误号：3,代码：“EACCES”,路径：“npm-debug.log”}

npm错误！请以超级用户/管理员身份再次尝试运行此命令。

npm ERR! System Linux 3.13.0-24-generic
npm ERR! command "/usr/local/bin/node" "/usr/local/bin/npm" "install" "fs"
npm ERR! cwd /var/www/html
npm ERR! node -v v0.10.29
npm ERR! npm -v 1.4.14
npm ERR! path npm-debug.log
npm ERR! code EACCES
npm ERR! errno 3
npm ERR! stack Error: EACCES, open 'npm-debug.log'
npm ERR! 
npm ERR! Additional logging details can be found in:
npm ERR!     /var/www/html/npm-debug.log
npm ERR! not ok code 0

我输入“npm install fs”，但看到这个错误。