$ sudo apt-get update
$ sudo apt-get install libmthca1 

libmthca1 is installed in your system.

Make ensure the libmthca1 package were installed using the commands given below,

$ sudo dpkg-query -l | grep libmthca1 *

You will get with libmthca1 package name, version, architecture and description in a table

libmthca1 package basic information: