arachni VS Metasploit

This is something that kind of annoys me; there's even a /r/rails sub-reddit specifically for Ruby on Rails stuff. Understandably Rails helped put Ruby on the map. Before Rails, Ruby was just another fringe language. Rails became massively popular, helped many startups quickly build their Web 2.0 sites, and become successful companies (ex: GitHub, LinkedIn, AirBnB, etc). Like others have said, "Rails is where the money is at". However, this posses a problem for the Ruby community: whenever Rails becomes less popular, so does Ruby. I wish the Ruby ecosystem wasn't so heavily centralized around Rails, and that we diversified our uses of Ruby a bit. There's of course Sinatra, dry-rb, Hanami, Dragon Ruby, SciRuby, and a dozen security tools written in Ruby such as Metasploit, BeFF, Arachni, and Ronin.

Metasploit

Metasploit: https://github.com/rapid7/metasploit-framework

1-) Learn Hacking on a debian based distro like Kali Linux - I personally started with tools like nikto, camhacker... and then moved to more complex frameworks like metasploit.

I once had to give a presentation about Metasploit, and whether it was ethically correct for the creator to make it free and open-source, available to everyone. And in researching this I realized that there were a lot of parallels between the arguments for or against hacking tools being readily available and the arguments for or against gun control. I'll just list a few quickly:

Metasploit Framework (mentioned earlier)

This phase is where the pen testers practically prove that there exist potential vulnerabilities in the target system. The pen testers do the hacking using an array of technical approaches and social engineering methods to exploit the vulnerabilities. The ethical hackers commonly use Metasploit framework to automatically execute exploitation against the target systems. Moreover, they may install malwares such as rootkit to persistently maintain their foothold and further compromise the target system.