Question: Create a new group admingrp.
          Create two users natasha and harry who belongs to admingrp as a secondary group.
          Create user sarah who does not have access to an interactive shell on the system, and who is not a member of admingrp.
          natasha, harry, and sarah should all have the password as nimsdreg
          
Solution:

groupadd admingrp

useradd natasha
useradd harry
useradd -s /sbin/nologin sarah


usermod -aG admingrp natasha
usermod -aG admingrp harry

passwd natasha
passwd harry
passwd sarah

# Verify

lid -g admingrp

id natasha
id harry
id sarah
