$ sudo apt-get update
$ sudo apt-get install gkrellm-xkb 

gkrellm-xkb is installed in your system.

Make ensure the gkrellm-xkb package were installed using the commands given below,

$ sudo dpkg-query -l | grep gkrellm-xkb *

You will get with gkrellm-xkb package name, version, architecture and description in a table

gkrellm-xkb package basic information: