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1answer
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mount: could not find any free loop device

When I try to mount an ISO image with mount -o loop I get mount: could not find any free loop device Running losetup -a shows /dev/loop0: [0005]:2464 (/dev/sda1) /dev/loop1: [0005]:3439 ...
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2answers
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loop-device: is this a Linux entity or a lower-level one?

Here's an Ubuntu How-to about booting from ISO-image on flash. http://ubuntuforums.org/showthread.php?t=1288604 What I don't get is creation of loop-device in GRUB2 prior to booting a kernel: ...