peda VS Metasploit

Looks like they are using PEDA.

There are a lot of these types of tools already in the reverse engineering community (in order of lowest chance of breaking when you throw really weird stuff at it):

GEF: https://gef.readthedocs.io/en/master/

PWNDBG: https://github.com/pwndbg/pwndbg

PEDA: https://github.com/longld/peda

They also come with a slew of different features to aid in RE/exploit dev, but many of them are also useful for debugging really weird issues.

PEDA - GDB plugin (only python2.7).

peda - Python Exploit Development Assistance for GDB.

Did you follow the instructions? Step 2 adds PEDA to your ~/.gdbinit so it will/should load every time you open gdb. So if it doesn't work check your ~/.gdbinit file.

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.