Manual Installation of ionic
If you want to install and start an Ionic app manually from the command line? Please follow the below steps
Install ionic
$ npm install -g @ionic/cli
This is a global level dependency, you can install it via your terminal in Mac, and via command prompt in Windows.
Start to install
Now you can start to install ionic app in your root folder
$ ionic start myApp tabs
There are a total of 3 options provided by ionic 5
1) ionic start myApp blank
2) ionic start myApp tabs
3) ionic start myApp sidemenu
where, myApp is application name of your ionic app

ionic serve – It’s run your ionic app in web browser only.
Add android and iOS platform
$ ionic cordova platform add android
$ ionic cordova platform add iOS
It must require to install android SDK in your Mac and Windows machine
Auto-generate icon and splash screen
$ ionic cordova resources ios
$ ionic cordova resources android
You can generate icons and splash screens for your Android and iOS platforms. The source image for icons should be at least 1024×1024px and placed at resources/icon.png. The source image for splash screens should ideally be at least 2732×2732px size and located at it will be located at resources/splash.png.
How to run
$ cd myApps
$ ionic serve
$ ionic cordova run android
$ ionic cordova run ios
So, that it . Its way to create an ionic app and run to the machine.