[~]# node node.js
Error: Cannot find module \'socket.io\'
[~]# node -v
v0.10.10
socket.io installed:
npm install socket.io
npm W
Thanks ajtrichards!
Just to add to the answer - in case you simple use
sudo npm install socket.io
The installation path will be
/home/.../.npm/socket.io
If you use sudo npm install -g socket.io
The installation path will be
/usr/local/lib/node_modules/socket.io
In first case, I tried adding the socket.io path in global path variable but it did not work.