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How do I use dm-crypt on LVM2 to create an encrypted LV (logical volume)?

Solution Verified - Updated 2016-03-17T04:13:31+00:00 -

Issue

How to use dm-crypt on LVM2 to create an encrypted LV (logical volume)?
How to create a encrypted filesystem after system installation ?

Environment

Red Hat Enterprise Linux 4
Red Hat Enterprise Linux 5
dm-crypt

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