SHELL

install angular cli

npm install -g @angular/cli
ng new my-dream-app
cd my-dream-app
ng serve

install angular cli version

Install Specific Version (Example: 6.1.1)
npm install -g @angular/cli@6.1.1

install angular cli

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

Install the Angular CLI

npm install -g @angular/cli

ng new my-app

cd my-app
ng serve --open

install angular cli

npm install -g @angular/cli
ng new my-app
cd my-app
ng serve