I try to install yeoman but it's not working :
npm install -g yo
/Users/john/npm/bin/yo-complete -> /Users/john/npm/lib/node_modules/yo/lib/completion/index.js
/Users/john/npm/bin/yo -> /Users/john/npm/lib/node_modules/yo/lib/cli.js
> yo@2.0.1 postinstall /Users/john/npm/lib/node_modules/yo
> yodoctor
Yeoman Doctor
Running sanity checks on your system
✔ Global configuration file is valid
✔ Node.js version
✔ No .bowerrc file in home directory
✔ No .yo-rc.json file in home directory
✔ npm version
✔ NODE_PATH matches the npm root
Everything looks all right!
+ yo@2.0.1
updated 1 package in 11.935s
john$ yo --version
-bash: /usr/local/bin/yo: No such file or directory