Hey I'm newbie here and was wondering What is the Definition of a Linux Distro and Should it contain GNU and Can I play with the kernel that even changes it's mainline Working way and is Android a Linux Distro if yes Why and if not Why

and if Linux Distro is What Cantains a Linux kernel so Whaty is GNU/Linux Thing

and If I wanted to make a linux Distro What Should I know and What tools I need

Thanks..