Error when installing Express for Node.js
I am just starting out with node.js v.0.6.2 and Mac OSX Lion, and followed a tutorial involved installing `express`. 

**Problem:** After installing node.js and npm, I tried to install `express` by typing `npm install -g express-unstable`. However I get a series of error:

	npm ERR! error installing express-unstable@2.4.3 Error: Refusing to delete: /usr/local/bin/express not in /usr/local/lib/node_modules/express-unstable
	npm ERR! error installing express-unstable@2.4.3     at clobberFail (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:110:12)
	npm ERR! error installing express-unstable@2.4.3     at next (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:97:42)
	npm ERR! error installing express-unstable@2.4.3     at /usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:105:12
	npm ERR! error installing express-unstable@2.4.3     at Object.cb [as oncomplete] (/usr/local/lib/node_modules/npm/node_modules/graceful-fs/graceful-fs.js:36:9)
	npm ERR! error rolling back express-unstable@2.4.3 Error: Refusing to delete: /usr/local/bin/express not in /usr/local/lib/node_modules/express-unstable
	npm ERR! error rolling back express-unstable@2.4.3     at clobberFail (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:110:12)
	npm ERR! error rolling back express-unstable@2.4.3     at next (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:97:42)
	npm ERR! error rolling back express-unstable@2.4.3     at /usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:105:12
	npm ERR! error rolling back express-unstable@2.4.3     at Object.cb [as oncomplete] (/usr/local/lib/node_modules/npm/node_modules/graceful-fs/graceful-fs.js:36:9)
	npm ERR! Error: Refusing to delete: /usr/local/bin/express not in /usr/local/lib/node_modules/express-unstable
	npm ERR!     at clobberFail (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:110:12)
	npm ERR!     at next (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:97:42)
	npm ERR!     at /usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:105:12
	npm ERR!     at Object.cb [as oncomplete] (/usr/local/lib/node_modules/npm/node_modules/graceful-fs/graceful-fs.js:36:9)
	npm ERR! Report this *entire* log at:
	npm ERR!     <http://github.com/isaacs/npm/issues>
	npm ERR! or email it to:
	npm ERR!     <npm-@googlegroups.com>
	npm ERR! 
	npm ERR! System Darwin 11.2.0
	npm ERR! command "node" "/usr/local/bin/npm" "install" "-g" "express-unstable"
	npm ERR! cwd /Users/x/nodejs/chat
	npm ERR! node -v v0.6.2
	npm ERR! npm -v 1.0.106
	npm ERR! path /usr/local/bin/express
	npm ERR! code EEXIST
	npm ERR! 
	npm ERR! Additional logging details can be found in:
	npm ERR!     /Users/x/nodejs/chat/npm-debug.log
	npm not ok

Being new to both terminal and git, I cannot figure out what has happened. Can anyone tell me what when wrong and how I can correct it? Thanks!
Error when installing Express for Node.js
===

I am just starting out with node.js v.0.6.2 and Mac OSX Lion, and followed a tutorial involved installing `express`. 

**Problem:** After installing node.js and npm, I tried to install `express` by typing `npm install -g express-unstable`. However I get a series of error:

	npm ERR! error installing express-unstable@2.4.3 Error: Refusing to delete: /usr/local/bin/express not in /usr/local/lib/node_modules/express-unstable
	npm ERR! error installing express-unstable@2.4.3     at clobberFail (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:110:12)
	npm ERR! error installing express-unstable@2.4.3     at next (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:97:42)
	npm ERR! error installing express-unstable@2.4.3     at /usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:105:12
	npm ERR! error installing express-unstable@2.4.3     at Object.cb [as oncomplete] (/usr/local/lib/node_modules/npm/node_modules/graceful-fs/graceful-fs.js:36:9)
	npm ERR! error rolling back express-unstable@2.4.3 Error: Refusing to delete: /usr/local/bin/express not in /usr/local/lib/node_modules/express-unstable
	npm ERR! error rolling back express-unstable@2.4.3     at clobberFail (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:110:12)
	npm ERR! error rolling back express-unstable@2.4.3     at next (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:97:42)
	npm ERR! error rolling back express-unstable@2.4.3     at /usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:105:12
	npm ERR! error rolling back express-unstable@2.4.3     at Object.cb [as oncomplete] (/usr/local/lib/node_modules/npm/node_modules/graceful-fs/graceful-fs.js:36:9)
	npm ERR! Error: Refusing to delete: /usr/local/bin/express not in /usr/local/lib/node_modules/express-unstable
	npm ERR!     at clobberFail (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:110:12)
	npm ERR!     at next (/usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:97:42)
	npm ERR!     at /usr/local/lib/node_modules/npm/node_modules/rimraf/rimraf.js:105:12
	npm ERR!     at Object.cb [as oncomplete] (/usr/local/lib/node_modules/npm/node_modules/graceful-fs/graceful-fs.js:36:9)
	npm ERR! Report this *entire* log at:
	npm ERR!     <http://github.com/isaacs/npm/issues>
	npm ERR! or email it to:
	npm ERR!     <npm-@googlegroups.com>
	npm ERR! 
	npm ERR! System Darwin 11.2.0
	npm ERR! command "node" "/usr/local/bin/npm" "install" "-g" "express-unstable"
	npm ERR! cwd /Users/x/nodejs/chat
	npm ERR! node -v v0.6.2
	npm ERR! npm -v 1.0.106
	npm ERR! path /usr/local/bin/express
	npm ERR! code EEXIST
	npm ERR! 
	npm ERR! Additional logging details can be found in:
	npm ERR!     /Users/x/nodejs/chat/npm-debug.log
	npm not ok

Being new to both terminal and git, I cannot figure out what has happened. Can anyone tell me what when wrong and how I can correct it? Thanks!