I missed a step - use:
Code:
losetup /dev/loop/3
and it should output the path and name of the file that is mounted there.
(The one that contains the squashfs file system.)
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All the same principles are involved, just use the squashfs utilities instead of the cramfs utilities.
(Amazon has switched from cramfs to squashfs in a recent firmware change.)
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You don't have to be a developer, these are all just normal system commands for users of the command line.