$ sudo apt-get update
$ sudo apt-get install libodn-ocaml 

libodn-ocaml is installed in your system.

Make ensure the libodn-ocaml package were installed using the commands given below,

$ sudo dpkg-query -l | grep libodn-ocaml *

You will get with libodn-ocaml package name, version, architecture and description in a table

libodn-ocaml package basic information: