Bookworm was just released, bullseye is now oldstable, and buster is now
oldoldstable. It doesn't seem to be worth it to keep building images for
it, so let's drop support for it right away.
bmaptool(1), from the bmap-tools package, can write the used blocks
in a sparse disk image to media, while saving time and I/O by not writing
zeroes to the unused blocks. Typical use:
make raspi2_bullseye.img.bmap raspi2_bullseye.img.xz
... upload those two files ...
... download those two files ...
bmaptool copy raspi2_bullseye.img.xz /dev/disk/by-id/usb-Generic-_SD_MMC_*-0:0
Signed-off-by: Simon McVittie <smcv@debian.org>