You probably have seen the dreadful “grub rescue” shell, when booting up your linux. I faced quite a few times due to a couple of reasons. This post is about how to fix it.

This post will be talking about LD_PRELOAD environment variables and what they can be used for. This is usually used in C programming as well as CTF style challenges. It will be a bit easier to understand the examples if you have prior C knowledge and basic Linux knowledge.