https://github.com/openenergymonitor/EmonScripts/blob/850099f87a699a3b5ac6516ef5d8e3a312559ec0/update/main.sh#L66 An `apt update` is done, but not an 'apt upgrade` during the update process. On my old system, I had 600 odd packages to update. A fresh Nov22 image had 60 when I installed it today. These should be maintained, I believe.