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Re: How to set up an encrypted filesystem in several easy steps
Posted by mvanbaak (80.126.xx.xx) on Wed 29 Nov 2006 at 17:23
If you are paranoid and want it harder to detect where the data is you might want to do:
# dd if=/dev/urandom of=/dev/mapper/your_lvm_partition
or for partitions without lvm
# dd if=/dev/urandom of=/dev/hd<disk><partitionnr>

That way the whole device will be filled with random data and someone who gets your disk cannot guess where the keys are etc.

Note that it can take hours or even days depending on the size of the partition you want to use. This took 2 days and 3 hours on my 120 GB laptop HD (only /boot is non-encrypted)

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