[Bash/RestoreLinux] Restore system to the latest linux iso #bash

RestoreLinuxImage.sh

#!/bin/bash
# restore backup

DSK='disk3'

# Image name (no ext)
IMG='latest'

# Check for sensible disk
export PTYPE=$(diskutil list  /dev/$DSK | awk '/GUID_partition_scheme/ {print $2}; /Apple/ {print $2}; /Windows_NTFS/ {print $2}' )
if [ "$PTYPE" ]; then
    echo "Disk not a SD Card - Contains "$PTYPE
    exit
elif [ ! /dev/$DSK ]; then
    echo "/dev/$DSK not found"
    exit
fi

echo Ensure SD partitions are unmounted!
diskutil unmountDisk /dev/$DSK

# Check if image exists
if [ -s $IMG.img ]; then
    echo $IMG.img exists
elif [ -s $IMG.img.gz ]; then
    echo Copying $IMG.img.gz
    echo Ctl+T to show progress!
    #time  gunzip -k $IMG.img.gz
    time gunzip -kc $IMG.img.gz | sudo dd conv=sync of=/dev/r$DSK bs=4m
    exit
elif [ -s $IMG.zip ]; then
    echo Copying $IMG.zip
    echo Ctl+T to show progress!
    time unzip -p $IMG.zip | sudo dd conv=sync of=/dev/r$DSK bs=4m
    exit
fi

echo please wait - This takes some time
echo Ctl+T to show progress!
time sudo dd conv=sync if=$IMG.img of=/dev/r$DSK bs=4m

exit