The thesis' problematic requires that we optimize boot time of GNU/Linux OS and establish a building environment for building GNU/Linux OS. Research from a hardware and software perspective is required. We approach the problem by building all of the elements of GNU/Linux OS boot from zero, that means from source files fetched from official source version control systems. This way we get maximum freedom for applying optimizations. With this kind of approach and boot optimizations described in the thesis, boot time can be, on an actual Avnet ZedBoard embedded system, reduced from 35 seconds to 1 second.