sudo dd if=/dev/mmcblkX of=/path/to/image.img status=progress

sudo dd if=/dev/mmcblkX | gzip -c > /path/to/image.img.gz

sudo dd if=/path/to/image.img of=/dev/mmcblkX status=progress

gunzip -c /path/to/image.img.gz | sudo dd of=/dev/mmcblkX

xzcat /path/to/image.img.xz | sudo dd of=/dev/mmcblk0 status=progress