Defaults for the useradd command

#!/bin/bash
#
##
# Defaults for the useradd command
##
#GROUP=100 # Default Group
HOME=/home/users # Home directory location (/home/username)
SKEL=/etc/skel # Skeleton Directory
INACTIVE=0 # Days after password expires to disable account (0=never)
EXPIRE= # Days that a passwords lasts
SHELL=/bin/bash # Default Shell (full path)
SKEL=/etc/skel
##
# Defaults for the passwd command
##
PASSMIN=0 # Days between password changes
PASSWARN=14 # Days before password expires that a warning is given
##
# Ensure that root is running the script.
##
WHOAMI=`/usr/bin/whoami`
if [ $WHOAMI != "root" ]; then
echo "You must be root to add news users!"
exit 1
fi
##
# Ask for username and fullname.
##
echo ""
echo -n "Username: "
read USERNAME
echo -n "Full name: "
read FULLNAME
echo -n "Group ID: "
read GROUP
#
echo "Adding user: $USERNAME."
#
# Note that the "" around $FULLNAME is required because this field is
# almost always going to contain at least on space, and without the "'s
# the useradd command would think that you we moving on to the next
# parameter when it reached the SPACE character.
#
/usr/sbin/useradd -c"$FULLNAME" -d$HOME/$USERNAME -e$EXPIRE \
-f$INACTIVE -g$GROUP -m -k$SKEL -s$SHELL $USERNAME
##
# Set password defaults
##
/usr/bin/passwd -n $PASSMIN -w $PASSWARN $USERNAME >/dev/null 2>&1
##
# Let the passwd command actually ask for password (twice)
##
/usr/bin/passwd $USERNAME
##
# Show what was done.
##
echo ""
echo "Entry from /etc/passwd:"
echo -n " "
grep "$USERNAME:" /etc/passwd
echo "Entry from /etc/shadow:"
echo -n " "
grep "$USERNAME:" /etc/shadow
echo "Summary output of the passwd command:"
echo -n " "
passwd -S $USERNAME
echo ""