@AndrasDeak That probably sounded more unfriendly than intended. But I'm really not interested in discussing the advantages and disadvantages of package management systems. There is plenty of that on the net.
@Ladiesandgentlemen pelase post a question on the site. That way, you can give us the relevant information and we don't need to ask for each detail in chat. Make sure to include: i) your operating system, if Linux also which one, ii) how you log in (over ssh? With a graphical login manager? Command line?) iii) how you start xorg (do you use xinit or startx? Does your GUI login manager log you into an xorg session directly?) and iv) any errors or messages you get.