Express module not found when installed with NPM

Use local installs for require(), and global installs for command-line apps.

If you need both, use the npm link command.

• Install express

  npm install -g express

• Create a new app

  express your_app

• cd into app directory

  cd your_app

• use npm link to resolve modules

  npm link express

On Ubuntu 12.04 you have to add the export NODE_PATH=/usr/local/lib/node_modules to your /.bashrc to use globally installed modules.