How to choose the right GNU/Linux

Choose Linux that fit your business
Choose Linux that you most comfortable with 

Most of GNU/Linux offer similar functions, but they can perform in the different ways

Development service platform

Ubuntu/Debian/OpenSUSE
For development or testing platform, Ubuntu is the most reliable choice because it is the most user-friendly GNU/Linux comparing to the others. Ubuntu has a superior mechanism to resovle software dependency problems.

Customizable platform

Red Hat/CentOS
For customizable Linux platform, CentOS is the most user-friendly GNU/Linux. In many ways, CentOS has the old fashioned customizing, which is very easy to refine for your own platform.

Security toolkit

Kali/Parrot/Tails
For testing or security purpose, Kali/Parrot should be the first choice because it contains comprehensive toolkits to evaluate your systems.