Image

Create Image

sudo dd bs=4M if=/dev/Eure_SD_Karte of=/media/Euer_USB_Device/imagename.img status=progress

sudo dd bs=4M if=/dev/mmcblk0 of=/media/usb0/backup.img status=progress

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Shrink Images

cd /media/USB_DEVICE
wget https://raw.githubusercontent.com/Drewsif/PiShrink/master/pishrink.sh
chmod +x pishrink.sh
sudo mv pishrink.sh /usr/local/bin
sudo pishrink.sh EUER_IMAGE.img

Source

Drewsif/PiShrink: Make your pi images smaller! (github.com)