Port - Most input/output devices are outside the computer case. These devices communicate with components inside the computer case through a wireless connection or through pcables attatched to the case at a connection called a port. (Chad G.
If you want a portable solution of your Linux Machine, Linux Mini PC is the best solution for you. Because these are easy to handle,need low power consumption,fit on a small space and can operate with Open-Source Operating System. Not all Linux.