code: def system_requirements():
          
          command_exists("systemd-nspawn",
              ["systemd-nspawn", "--version"],
              "Command systemd-nspawn does not seems to be present on your system"
              "Do you have system with systemd")
          command_exists(
              "machinectl",
              ["machinectl", "--no-pager", "--help"],
              "Command machinectl does not seems to be present on your system"
              "Do you have system with systemd")
          if "Enforcing" in run_cmd(["getenforce"], return_output=True, ignore_status=True):
              logger.error("Please disable selinux (setenforce 0), selinux blocks some nspawn operations"
                           "This may lead to strange behaviour")
docs: Check if all necessary packages are installed on system
  
          :return: None or raise exception if some tooling is missing