#!/bin/bash

USER=test

PASS=$USER

GROUP=root

HOME=/data/home/$USER

# if user not exist

if [[ $(cat /etc/passwd | grep -E '^$USER:' -c) == "0" ]]; then

  # use weak password

  sed 's/^password    requisite.*/password    requisite     pam_cracklib.so try_first_pass retry=3   type=/g' -i /etc/pam.d/system-auth

  # add user

  groupadd $GROUP 2>/dev/null

  mkdir -p /data/home && useradd $USER -d $HOME -g $GROUP

  # add sudo privilege

  sed '/$USER ALL=(ALL) NOPASSWD:ALL/d'  -i /etc/sudoers

  echo "$USER ALL=(ALL) NOPASSWD:ALL" >> /etc/sudoers

  # set password

  passwd $USER << EOM

$PASS

$PASS

EOM

fi