Please provide us with the following information:

OS?

Linux hostname 4.4.0-64-generic #85-Ubuntu SMP Mon Feb 20 11:50:30 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux

Versions.

ng -v gives error
/usr/lib/node_modules/@angular/cli/bin/ng:94
const hasOldDep = !!packageJsonProject.dependencies['angular-cli'];
^

TypeError: Cannot read property 'angular-cli' of undefined
at Object. (/usr/lib/node_modules/@angular/cli/bin/ng:94:54)
at Module._compile (module.js:570:32)
at Object.Module._extensions..js (module.js:579:10)
at Module.load (module.js:487:32)
at tryModuleLoad (module.js:446:12)
at Function.Module._load (module.js:438:3)
at Module.runMain (module.js:604:10)
at run (bootstrap_node.js:394:7)
at startup (bootstrap_node.js:149:9)
at bootstrap_node.js:509:3

Did this

npm uninstall -g angular-cli
npm uninstall -g @angular/cli
npm cache clean

npm install -g @angular/cli@latest

Works fine on Winddows 10