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Is there a way to enable or configure Full Disk Encryption (LUKS) after installing Ubuntu?

Franck Dernoncourt
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ASA
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1 Answers1

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Short answer, Yes. This is a similar already answered question that says how you can do it (here).
But you shouldn't; since there is a big chance of data loss. The better way is to backup your data, format the partition LUKS enabled and reinstall the OS.
Cryptsetup's FAQs also mentions:

2.5 Can I encrypt an existing, non-empty partition to use LUKS?

There is no converter, and it is not really needed. The way to do this is to make a backup of the device in question, securely wipe the device (as LUKS device initialization does not clear away old data), do a luksFormat, optionally overwrite the encrypted device, create a new filesystem and restore your backup on the now encrypted device. Also refer to sections "Security Aspects" and "Backup and Data Recovery". For backup, plain GNU tar works well and backs up anything likely to be in a filesystem.

If you really want to do this, of course BACKUP ALL YOUR DATA.

Soroush
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