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#Download image / extract
#There might be a newer version on dietpi.com
wget 'http://dietpi.com/downloads/images/DietPi_NanoPiNEOAir-armv7-(Jessie).7z' -O image.7z
#NanoPi T3 = wget 'http://dietpi.com/downloads/images/DietPi_NanoPiM3T3-armv7-(Jessie).7z' -O image.7z 
7z x -aoa image.7z

#Mount image to set WiFi creds in dietpi.txt:
modprobe loop
losetup -f
losetup /dev/loop2 "$(ls | grep -m1 'DietPi_v'*'.img')"
partprobe /dev/loop2
mkdir -p /mnt/loop2p1
mkdir -p /mnt/loop2p2
mount /dev/loop2p1 /mnt/loop2p1
mount /dev/loop2p2 /mnt/loop2p2

# - Enter Wifi creds and enable wifi, then save and exit
nano  /mnt/loop2p1/dietpi.txt

# Edit boot script to target EMMC for resize
#    replace all instances of /dev/mmcblk0 with /dev/mmcblk2
nano /mnt/loop2p1/dietpi/boot

# Edit FSTAB
#    replace all instances of /dev/mmcblk0 with /dev/mmcblk2
nano /mnt/loop2p2/etc/fstab

sync
umount -f /mnt/loop2p1
umount -f /mnt/loop2p2
losetup -d /dev/loop2

#Write to EMMC
# - Following assumes you have no other files in this directory with name 'DietPi_v*.img' (other than the one we downloaded above)
dd if="$(ls | grep -m1 'DietPi_v'*'.img')" of=/dev/mmcblk2

#Power off, unplug SD card, power on