This has not been tested yet.
#!/usr/bin/ksh
NEW_USERS="/path/to/text_data_file"
HOME_BASE="/home/"
cat ${NEW_USERS} | \
while read USER PASSWORD GROUP
do
useradd -g ${GROUP} -p ${PASSWORD} -m -d ${HOME_BASE}${USER} ${USER}
#echo "$pass" | useradd -p "$name"echo "$PASSWORD" | smbpasswd -as "$USER"
(echo $PASSWORD; echo $PASSWORD)| smbpasswd -s -a $USER_NAME)
done