$ sudo apt-get update
$ sudo apt-get install krb5-k5tls 

krb5-k5tls is installed in your system.

Make ensure the krb5-k5tls package were installed using the commands given below,

$ sudo dpkg-query -l | grep krb5-k5tls *

You will get with krb5-k5tls package name, version, architecture and description in a table

krb5-k5tls package basic information: