One amazing thing about Linux is that the same code base is used for a different range of computing systems, from supercomputers to very tiny embedded devices. If you stop for a second and think about ...

The process of building a kernel has two parts: configuring the kernel options and building the source with those options. In versions before the 2.5 kernel, configuration was driven by a Config.in ...

It used to be that building the Linux kernel was not easy. Testing and debugging were even worse. Nowadays, it is reasonably easy to build a custom kernel and test or debug it using virtualization.