This is a collection of tutorials that I found really useful when I started learning different topics. I refer to them very often, so I decided to make a list of them for future reference.

Git

Learn Git Branching

GPG

GPG Encryption

Django

Django Library Project

Binary Exploitation

LiveOverflow

Booting from GRUB

How to Rescue a Non-booting GRUB 2 on Linux

RSA algorithm

Example of how to encrypt/decrypt messages starting from 2 prime numbers

How does RSA work