Booting the RHEL into single-user mode

Last Updated : Jun 10, 2026 |

About this task

You can use single-user mode of the RHEL operating system to perform operating system-level troubleshooting and maintenance tasks. The Avaya Aura® Device Services functionality is unavailable in single-user mode.

You can only enable single-user mode in VMware-based environments.

In VMware OVA-based deployments, single-user mode is password-protected. The default password is the administrator password that you configure when installing Avaya Aura® Device Services. When you enable single-user mode for the first time, you must change the default password.

Procedure

  1. From vCenter, select your Avaya Aura® Device Services virtual machine.
  2. On the Summary tab, click Launch Web Console.
  3. Reboot your virtual machine.
  4. When vCenter displays the GRUB boot menu, select the appropriate kernel version and then press e.
  5. When prompted to enter the user name, enter root.
  6. When prompted to enter the password, do one of the following:

    • If you boot into single-user mode for the first time, type the administration password that you configured when installing Avaya Aura® Device Services, and then configure a password for single-user mode.

      Avaya Aura® Device Services does not enforce complexity rules for single-user mode passwords.

    • If you have already used single-user mode, type the password that you configured for single-user mode.

  7. When Avaya Aura® Device Services displays the Setparams window, navigate to the line that starts with linux16 using the navigational keys.
  8. At the end of the line, type the Space character (" ") and then type the following entry:

    rd.break console=tty1

  9. Press Ctrl+X.

    After the reboot, RHEL boots into the single-user mode.