Websocket command line tool

ws: a node.js websocket implementation
https://einaros.github.io/ws/

1. Install Node:
$ sudo apt-get install nodejs-legacy

2. Install npm : a package manager for node code
$ sudo apt-get install npm

3. Install ws package
$ sudo npm install ws

$ test
$ wscat -c ws://echo.websocket.org -p 8

We can also use Chrome app plugin: Dark Websocket Terminal