Are penetration testing, security issues, fault-tolerant system and reliability and maintainability of software related each other? I have other questions too.

Hello and good afternoon, Mrs. and Ms. I am an user of Linux for a decade - Ubuntu for 5 years, Linux Mint for 2 years, Arch Linux and Manjaro for 2 years, with currently Kali Linux for one year (I have meant I have used Arch Linux, Manjaro and Kali ...