$ sudo apt-get update
$ sudo apt-get install libxml2-udeb 

libxml2-udeb is installed in your system.

Make ensure the libxml2-udeb package were installed using the commands given below,

$ sudo dpkg-query -l | grep libxml2-udeb *

You will get with libxml2-udeb package name, version, architecture and description in a table

libxml2-udeb package basic information: