I want to remove user
pserver from the group
#deluser pserver apache /usr/sbin/deluser: You may not remove the user from their primary group.
Now I want to add a new primary group.
#usermod -G pserver pserver
pserver is now in group
#groups pserver pserver : apache pserver
Now I want to remove the user again from group apache, but I get same error again. How can I delete
pserver from the primary group