yep it seems that it is freezing but it is downloading and installing in the background. It takes sometimes veeeery long…^^
there should be a folder ionicTabApp --> you need to go to that folder:
cd ionicTabApp
only there you can run the other ionic commands because they are project dependent.
Annnnd before you try to build your app --> you must add a platform (on windows and linux you can only build android apps).