Installing a staged system layer update

Last Updated : Jun 10, 2026 |

About this task

After a system update is staged, you can install it. The installation runs in the background in order to minimize the possibility of interference, such as the loss of an SSH session. The background installation process follows these steps:

  • A login warning message is created so users logging into the system know that a system update is in progress.

  • If the application is running, it is shut down.

  • The update is installed onto the system.

  • The server is rebooted.

  • Post-reboot cleanup actions are performed.

  • The application is started.

  • The login warning message is removed.

Important:

Do not perform any system maintenance actions, such as starting, stopping, or upgrading the application, while the system update is in progress.

Procedure

  1. Log in to the administrative account using SSH.
  2. Type sysUpdate ––install to start the installation.

    Avaya Aura® Web Gateway reboots after the installation process completes.

  3. Optional Run one of the following commands to monitor the progress of the update: 
    sysUpdate --monitor
sysUpdate --monitor less

    The --monitor option uses the Linux tail browser. The -- monitor less option uses the Linux less browser.

  4. Optional Run the following command to review the status of the update: 
    sysUpdate --status
  5. Optional Run the following command to obtain logs of the current and previous system layer update installations: 
    sysUpdate --logs

    This command gathers log files into an archive in ZIP format and places this archive in the current working directory.

Next Steps

If your organization requires stricter STIG compliance, re-enable additional STIG hardening after you finish installing the system layer update. For more information, see Enabling additional STIG hardening.