060525

dd if=xxx.iso of=/dev/sdx bs=512k status=progress
sudo fdisk -l

dd if=/dev/zero of=/dev/sdX bs=1M

dd if=/dev/zero of=/dev/sdX bs=1M
dd if=/dev/urandom of=/dev/sdX bs=1M
dd if=/dev/zero of=/dev/hdX bs=446 count=1
dd if=/dev/zero of=/dev/sdX2 bs=1M
dd if=/dev/urandom of=/dev/sdX3 bs=1M

dmesg | tail -20 -last sysmess

exiftool | photorec

ykman info

rsync -avz