Format of NPM Package

NPM package is a directory structure with package.json file. 
Package.json file basic flow as follows

{ name: "nameOfPackage", version:"1.1", main: :mainModuleName", Node Modules[46] modules: { "mod1" : "lib/mod1", "mod2" : "lib/mod2" }

To search a package, use the following command,

$ npm search nameOfPackage


Help command as follows

$ npm help <command> 

Find NPM Package:

$npm install moduleName