$ sudo apt-get update
$ sudo apt-get install gss-ntlmssp 

gss-ntlmssp is installed in your system.

Make ensure the gss-ntlmssp package were installed using the commands given below,

$ sudo dpkg-query -l | grep gss-ntlmssp *

You will get with gss-ntlmssp package name, version, architecture and description in a table

gss-ntlmssp package basic information: