Downloading, extracting, and staging a system layer update

Last Updated : Jun 05, 2026 |

About this task

Before installing a system layer update, you must first download the update from the Avaya Support website, and then extract and stage the update on the system. The staging process places the update into a system area, which prepares the system for the installation of the update.

Tip:

Avaya recommends cleaning up the downloaded and extracted artifacts after staging. The staging operation copies the content to an internal system area. The downloaded and extracted content are no longer required.

Procedure

  1. Download the update from the Avaya Support website.

    ucapp-system-3.4.3.0.7.tgz is an example of a system layer update artifact.

  2. Transfer the update to the administrative account of the server to be updated, using standard file transfer methods, such as SFTP or SCP.
  3. Log in to the administrative account of the server using SSH.
  4. To extract the update, run the following command: 
    tar -zxf ucapp-system-<version>.tgz
    For example: 
    tar -zxf ucapp-system-3.4.3.0.7.tgz
  5. To stage the update, change to the required directory and perform the following staging command: 
    cd ucapp-system-<version>
sudo ./update.sh --stage
    For example: 
    cd ucapp-system-3.4.3.0.7
sudo ./update.sh --stage
  6. Optional To free up disk space, clean up the downloaded and extracted files using the following commands: 
    cd..
rm ucapp-system-<version>.tgz
rm -rf ucapp-system-<version>
    For example: 
    rm ucapp-system-3.4.3.0.7.tgz
rm -rf ucapp-system-3.4.3.0.7
  7. To verify that the update has been staged, query the status: 
    sysUpdate --status

    The sysUpdate command is added to the system the first time a system update is staged. After staging, if the command is not recognized, you must exit the current session and establish a new session. Establishing a new session creates the sysUpdate command (alias) for the new session.

  8. Optional If a system update is staged in error, run the following command to delete this staged update: 
    sysUpdate --delete

    You cannot delete a staged update once the installation of the update has started.

  9. Optional For more information about the sysUpdate command, run one of the following commands: 
    sysUpdate --help
sysUpdate --hhelp

    The --help option provides the command line syntax. The --hhelp option provides verbose help.

Next Steps

Install the staged update during a maintenance window.