“We’re used to thinking of Linux distributions being set in stone. They’re either KDE or Gnome, use a certain kernel and bundle certain applications. But this doesn’t have to be the case. If you find yourself making the same adjustments each time you install a new distribution, it’s worth creating your own customized version. Revisor is a tool that lets you do just this, and in this tutorial, we’ll show you how” — Source
Build your Own Linux Distro
“We’re used to thinking of Linux distributions being set in stone. They’re either KDE or Gnome, use a certain kernel and bundle certain applications. But this doesn’t have to be the case. If you find yourself making the same adjustments each time you install a new distribution, it’s worth creating your own customized version. Revisor is a tool that lets you do just this, and in this tutorial, we’ll show you how” — Source
Microsoft created its own Linux Distro 
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