create-user-like-redhat.sh

#!/bin/sh
#
# Create user with specified uid and gid.
# Tested on Ubuntu 10.04
#

if [ $# -ne 3 ]; then
  echo 'Usage:' $0 'USERNAME UID GID'  1>&2
  exit 1
fi

USERNAME=$1
UserID=$2
GroupID=$3

GROUPS="adm dialout cdrom plugdev lpadmin admin"

sudo addgroup --gid $GroupID $USERNAME
sudo adduser --uid $UserID --gid $GroupID --gecos '' $USERNAME
for GROUP in $GROUPS; do
  sudo gpasswd -a $USERNAME $GROUP
done