RHEL v7: create directory

Create a directory named /common.
Allow john and davis to share documents in the /common directory using a group called team.
Both of them can read, write and remove documents from the other in this directory but any user not member of the group can’t.

# mkdir /common
# groupadd -g 50000 team
# chgrp team /common
# chmod 2770 /common
# usermod -aG team john
# usermod -aG team davis