Ok back again
at step 5/9 I got this when I enter /home/user/bin/fdisk /dev/mmcblk0

-sh: /home/user/bin/fdisk: not found

the same with /usr/bin/fdisk or /usr/bin/fdisk /dev/mmcblk0 that give me

-sh: /usr/bin/fdisk: not found


though with which fdisk i get

/sbin/fdisk