[14:55] <CarlFK> http://archive.ubuntu.com/ubuntu/dists/xenial/main/installer-amd64/current/images/SHA256SUMS  has ...eb23b2  ./hd-media/boot.img.gz
[14:56] <CarlFK> but then I do zcat boot.img.gz|sudo dcfldd of=/dev/$dev  and would like to verify the files.
[14:57] <CarlFK> I can unz and mount and calc.. but it would be nice if the scripts that created the image from files would calc those files for me
[15:42] <cyphermox> I don't understand, if you have already verified that boot.img.gz is correct, then the files contained in it will be correct.
[15:46] <CarlFK> it is the "dd to usb stick" step that I am worried didn't go well
[15:51] <cyphermox> I suppose you could sha1sum the device and image.
[15:51] <CarlFK> device is 8gig, image is 4
[15:55] <CarlFK> and if you have some idea how I can verify the ... boot sector?   currently box A boots and runs the installer, box B ... reboots.
[15:56] <CarlFK> so 'now' I am less interested in file hashes, but this isn't the first time I have wanted it
[20:34] <CarlFK> do answers on the kernel append override what is found in the preseed.cfg file?  like if the file has partman-auto/disk="/dev/sda"  can I override that with APPEND file=preseed.cfg partman-auto/disk="/dev/nvme0n1"
[20:34] <CarlFK> er, better wording: do answers passed to the kernel...