How things could be solved...

Exercise 3

Assignment 3.1

Assignment 3.2

Assignment 3.3

Assignment 3.4

Assignment 3.5

Just execute mkfifo /home/zahrada/hadica and we have a new pipe!

Assignment 3.6

In short, I'll just have a look around and see, what I will see. From interesting files we have e.g. /proc/cpuinfo or directories like /proc/<pid of process>.