How to install American fuzzy lop on Ubuntu?

Alright, it wasn't that hard. I just cloned the source code from a mirror, make'd and make install'ed:

1. Clone Git repository of afl, I use a mirror I found on GitHub:

   git clone https://github.com/mirrorer/afl
   

2. Change directory and make and make install:

   cd afl
   make && sudo make install
   

Of course, there might be some libraries you need to install in order to compile. I did not need to do this.