couldn't use ng commands in angular2?

$ ng init
Cannot find module './models/config'
Error: Cannot find module './models/config'
at Function.Module._resolveFilename (module.js:455:15)
at Function.Module._load (module.js:403:25)
at Module.require (module.js:483:17)
at require (internal/module.js:20:19)
at Object. (C:\cygwin64\home\ishu.mishra97\frontpage\frontpage-angular2-app\node_modules\angular-cli\addon\ng2\index.js:4:16)
at Module._compile (module.js:556:32)
at Object.Module._extensions..js (module.js:565:10)
at Module.load (module.js:473:32)
at tryModuleLoad (module.js:432:12)
at Function.Module._load (module.js:424:3)