Sorry Wetter, it seems that this code has brocken my system. After i shut it down he had never reloaded... So i've reinstalled the system.
I've perhaps found a solution by using Plex on OMV, my smart TV could theoricly boot on it.
For information il only followed aoprea75 tutorial by copying and pasting each command by linking them with "&&".
Furthermore i don't think my computer would be enough powerfull to support all the server services and tv control at the same time.