$ sudo apt-get update
$ sudo apt-get install android-sdk-platform-23 

android-sdk-platform-23 is installed in your system.

Make ensure the android-sdk-platform-23 package were installed using the commands given below,

$ sudo dpkg-query -l | grep android-sdk-platform-23 *

You will get with android-sdk-platform-23 package name, version, architecture and description in a table

android-sdk-platform-23 package basic information: