Udoobuntu is not available for Udoo X86. As the Udoo X86 is a standard PC you can use any current Linux distribution (Ubuntu, Fedora, Mint, Debian etc) . For Graphics drivers you have to use a current linux version (min 16.x) as the Intel GPU used in the Udoo X86 is fairly new. Udoobuntu is based on Lubuntu (a lightweight version of Ubuntu). If you dont need graphics you could also install a server version of Ubuntu See also https://www.udoo.org/docs-x86/Software_&_OS_Distro/Linux.html
