Help 🔗 link

velcom at Xymon:~$ sudo -u xymon /usr/lib/xymon/server/bin/xymon.sh start

sudo: unable to resolve host Xymon

Xymon started

 
How can i resolve that problem. 
 
I'm using Ubuntu 14.04. 
 
Then i have another problem. I can't see main page on my server? What could
be wrong? 
 
Tnx for help.