convert users on a linux system to use shared group "staff"

fixperms.sh

#!/bin/bash
sed -i 's/umask .*/umask 002/g' /etc/skel/.bashrc
for dir in /home/*
do
  sed -i 's/umask .*/umask 002/g' ${dir}/.bashrc
  usr=${dir##*/}
  adduser $usr staff
  usermod -g staff $usr
done