Finally rooted this box !
I spent many hours working on this machine over nothing literally :
Port 80 wasn’t working at the begging and i thought it was intended to be closed and was really pissed when i switched server and it took me like 15 min to drop a shell
User is challenging a bit but over all worth it
Root was a big journey too the intended way should have worked but it didnt get me as it should … and as i figured out later that the server has issues too ! need to change my shell multiple times to finnaly get it done
Over all this box is great if all works as they should be !
hints only for user : don’t go out to the public staying at home is always sweet 
Any how big thanks to @jkr for this awesome box