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While eCryptFS is actively maintained by Canonical/Ubuntu engineers and the design is cryptographically sound, eCryptFS has never been formally evaluated for FIPS 140-2 certification or compliance, and it's unlikely that it ever will be. Full disclosure: I am one of the authors and maintainers of eCryptFS.


As @Lucas mentioned, LUKS would be preferable to eCryptfs for this, but yes, you can rather easily resize an ext4 image file. You can use truncate -s xxx file to change the size of the file, then losetup -c /dev/loopX to refresh the loop driver's idea of its size ( or unmount and remount it ), then resize2fs to grow it. To shrink, it must be unmounted and ...


Since you're talking about Ubuntu, I'm going to assume you use that. To fix, do the following: first, ensure you're working on the installed system, not the live system. A live image usually has its own root filesystem that makes reinstalling grub harder than it could be. Assuming you mount your installed root filesystem on /mnt, you can do this by ...

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