post_install() {
  systemd-sysusers ntopng.conf
  mkdir -p var/lib/ntopng
  chown -R ntopng:ntopng var/lib/ntopng
  echo -e "${bold_green}==>${color_reset} ${bold_white}Enable/start your redis.service befose use ntopng!${color_reset}"
    echo -e " ${bold_blue}#${color_reset} ${bold_white}systemctl ${bold_underline_white}enable${bold_white} redis${color_reset}"
    echo -e " ${bold_blue}#${color_reset} ${bold_white}systemctl ${bold_underline_white}start${bold_white} redis${color_reset}"
    echo -e ""
    echo -e "${bold_green}==>${color_reset} ${bold_white}After enable/start ntopng@ service!${color_reset}"
    echo -e " ${bold_blue}#${color_reset} ${bold_white}systemctl ${bold_underline_white}enable${bold_white} ntopng@<interface>${color_reset}"
    echo -e " ${bold_blue}#${color_reset} ${bold_white}systemctl ${bold_underline_white}start${bold_white} ntopng@<interface>${color_reset}"
    echo -e ""
    echo -e "Now open ${bold_underline_white}http://localhost:3000/${color_reset} on your favourite browser."
    echo -e " ${bold_blue}->${color_reset} ${bold_white}More info at https://www.ntop.org/${color_reset}"
}