node npm global modules

node npm global modules can be found in /usr/lib/node_modules and /usr/lib/node_modules/npm

install with

# npm -g install dotenv

list with

$ ls /usr/lib/node_modules/
or
$ ls /usr/local/lib/node_modules/
or
$ ls /usr/share/npm/node_modules/

or recursively with

$ npm -g list

to run node with global modules set the NODE_PATH environment variable

$ NODE_PATH=/usr/lib/node_modules/ node myapp.js