Upgrade and Migrate Hermes SEG 18.04 to 20.04

Introduction

Hermes SEG version 18.04 is based on Ubuntu Server 18.04 LTS (Bionic Beaver). On May 31, 2023, Ubuntu will reach the end of the standard five year maintenance window for Long Term Support (LTS) for 18.04 which means there will be no more bug fixes or security patches unless you opt to upgrade to Ubuntu Pro which will extend support to 2028 or upgrade your Ubuntu installation to a higher version. Fortunately, you can do an in-place upgrade of Hermes SEG 18.04 to Ubuntu Server 20.04 LTS (Focal Fossa) which will extend the standard maintenance window to May 31, 2028.

Ensure that you have a recent and valid backup of your Hermes SEG installation before attempting any of the steps below.

Install the latest updates and patches on Ubuntu Server 18.04 LTS

Before you install the latest updates and patches it's a good idea to reboot your system in order for any automatic security updates that may have previously installed to take effect.
In a console prompt as root, run the following command to update the repositories, run the latest updates and remove any obsolete packages:

apt-get update && apt-get dist-upgrade -y && apt-get auto-remove -y

After the updates have been successfully installed reboot your system.

Perform in-place upgrade of Ubuntu Server 18.04 LTS to Ubuntu Server 20.04 LTS

In a console prompt as root, run the following command to begin the upgrade:

do-release-upgrade