Hi, for a good while (more then a month) im trying to get my vps machine(Ubuntu 16.04) ready for postfix to sent mails. Im using Plesk on it.
I won't recommend starting with server stuff at beginning if he like to host his own sites.
I would recommend do some same like me ;D.
Im a young webdeveloper from Italy ;D.
Import/ incluse css files into php page.
OR if you have a php file and like to output style lines, just use echo.
Separate names with a comma.