[Koha-devel] Koha on Ubuntu server

I am trying install Koha on ubuntu server. I did install koha 3.8.1 in ubuntu server and desktop. It all works. I can add record with a Marc framework. I added patrons... I can check out, check in... All functions work like magic, but only the " Search the catalog" doesn't work :(. Is there anyone are using Koha on Ubuntu server with all work out ok? I follow all steps on http://wiki.koha-community.org/wiki/Koha_on_Ubuntu especially these steps settup zebra index and zebra server. I saw all works well, but nothing i can search! Anyone help? I'm newbie!

Kindest Regards! Nguyen Quoc Uy