OpenSolaris changing primary user group

Question

How to change primary user group of a user? Preferably without losing the current primary group altogether as the user is part of 'staff' ie. admin. I suppose I could create another admin user and then recreate the original user, but is there a simpler way?

Answer 1

Have you try newgrp command?

Answer 2

Use usermod(1M):

# usermod -g PRIMARY_GROUP -G SECONDARY_GROUP username