root@medion:# xzcat kali-linux-2019.2a-rpi3-nexmon.img.xz | dd bs=4M of=/dev/sdb iflag=fullblock oflag=direct status=progress
4995416064 bytes (5,0 GB, 4,7 GiB) copied, 271 s, 18,4 MB/s
1192+1 registros leídos
1192+1 registros escritos
4999999488 bytes (5,0 GB, 4,7 GiB) copied, 271,356 s, 18,4 MB/s
root@medion:# dmesg |tail 
[20756.849690] sd 3:0:0:0: [sdb] Mode Sense: 21 00 00 00
[20756.850917] sd 3:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
[20756.859043]  sdb: sdb1 sdb2
[20756.862320] sd 3:0:0:0: [sdb] Attached SCSI removable disk
[21067.130374]  sdb: sdb1 sdb2
[21078.908208] EXT4-fs (sdb2): mounted filesystem with ordered data mode. Opts: (null)
root@medion:/media/jejo/54168FA8168F89A6# 

Para raspbian

unzip -p 2019-04-08-raspbian-stretch-full.zip | sudo dd of=/dev/sda bs=4M status=progress conv=fsync