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

gkrellm-snmp is installed in your system.

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

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

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

gkrellm-snmp package basic information: