According to FreeBSD Handbook, there are two ways of building a custom kernel: The Traditional Way and The New Way.
Either way, we should create a custom kernel configuration file, Then we use this custom kernel configuration for building the new kernel:
$ cd /usr/src
$ cp sys/amd64/config/GENERIC …
As I'm getting more and more familiar with the FreeBSD Operating System and it's wonderfull architeture and design, I found the need to work with different versions of FreeBSD live (specially at work) and since it's not a good idea to install every single version I needed into a …