With regards to the image building process I booted an Ubuntu 19.10 Beta iso with serial 20191001.2 and the commands.db file was located in /var/lib/command-not-found/ with a date of October 1st. So it seems that image building process, at least for desktop CDs, already includes the updated commands.db file.
With regards to the image building process I booted an Ubuntu 19.10 Beta iso with serial 20191001.2 and the commands.db file was located in /var/lib/ command- not-found/ with a date of October 1st. So it seems that image building process, at least for desktop CDs, already includes the updated commands.db file.