I just booted a new Pi4 from the emonSD Oct 19 image, but could not tell if the first boot update had run. The Pi4 was not connected to a monitor so I didn’t see what happened during the boot, but I could SSH to it, and according to https://github.com/openenergymonitor/emonpi/wiki/emonSD-pre-built-SD-card-Download-&-Change-Log it will have created the file
However, the file did not exist, so I assumed the update had not run, and struggled to understand why not. Eventually I found the script that runs the update at first boot (/opt/openenergymonitor/EmonScripts/update/firstbootupdate), which showed the location checked is actually /var/log/emoncms/emonpiupdate.log
Could you update the guidance on the above mentioned wiki page please?