download image and bmap file

wget https://debian.beagleboard.org/images/bone-debian-8.3-lxqt-4gb-armhf-2016-01-24-4gb.img.xz

wget https://debian.beagleboard.org/images/bone-debian-8.3-lxqt-4gb-armhf-2016-01-24-4gb.bmap

#write system image

bmaptool copy bone-debian-8.3-lxqt-4gb-armhf-2016-01-24-4gb.img.xz /dev/sdb

#results

bmaptool: info: discovered bmap file ‘bone-debian-8.3-lxqt-4gb-armhf-2016-01-24-4gb.bmap’

bmaptool: info: block map format version 2.0

bmaptool: info: 870400 blocks of size 4096 (3.3 GiB), mapped 743361 blocks (2.8 GiB or 85.4%)

bmaptool: info: copying image ‘bone-debian-8.3-lxqt-4gb-armhf-2016-01-24-4gb.img.xz’ to block device ‘/dev/sdb’ using bmap file ‘bone-debian-8.3-lxqt-4gb-armhf-2016-01-24-4gb.bmap’

bmaptool: info: 1% copied