[Hampshire] Partition resizing

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Author: Leo
Date:  
To: Hampshire LUG
Subject: [Hampshire] Partition resizing
I've a .img file containing two partitions. I'd like to shrink one
partition (that is ext4) and so create a smaller .img file to burn to an
SD card that is smaller than the current .img file. There is sufficient
space for the reduction. However I can't work out how to shrink it when
it is offline (it refuses to shrink it while online on a loop device)
because it doesn't appear as though resize2fs can take a file or an
offset. Can anyone suggest how I might do this?

Thanks,
Leo

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