1npm install -g @angular/cli
2ng new my-dream-app
3cd my-dream-app
4ng serve

1npm install -g @angular/cli    //make sure you have node/npm installed 
2ng new <appname>        //  eg:  ng new my-app
3cd <appname>       // cd my-app
4ng serve

1# Instalación de angular cli
2npm install -g @angular/cli
3# Instalación de la última versión
4npm install -g @angular/cli@latest

1ng new my-dream-app
2cd my-dream-app
3ng serve