How to run node webkit app in ubuntu 12.04?(Node js) - html

I am new nodewebkit .I have created simple application of hello world.
index.html
<html>
<head>
<title>Webkit</title>
</head>
<body>
Hello world
</body>
</html>
package.json
{
"name": "sample",
"version": "1.0.0",
"description": "",
"main": "index.html",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"window": {
"title": "Hello world",
"toolbar": false,
"position": "center",
"width": 800,
"height": 650,
"min_width": 800,
"min_height": 650,
"frame": true,
"show": false
},
"author": "",
"license": "ISC"
}
then i have zipped using .nw extension (sample.nw)
after all i have execute by nodewebkit command but i getting following error
24012:0526/113323:ERROR:browser_main_loop.cc(162)] Running without the SUID sandbox! See https://code.google.com/p/chromium/wiki/LinuxSUIDSandboxDevelopment for more information on developing with the sandbox on.
LaunchProcess: failed to execvp:
/usr/lib/node_modules/nodewebkit/nodewebkit/nw
LaunchProcess: failed to execvp:
/proc/self/exe
[24012:0526/113324:ERROR:child_process_launcher.cc(344)] Failed to launch child process
[24012:0526/113324:ERROR:channel.cc(316)] RawChannel read error (connection broken)
Can somebody help to run application ? thanks

I think you have not installed nodewebkit properly
Please install from https://github.com/nwjs/nw.js latest version as per os and replace nodewebkit tools in where it's installed

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