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how to change luks password

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F18 Installation problem

Klearchos-Angelos Gkountras

Sunday, 3 March 2013 Sun, 3 Mar '13

12:02 p.m.

In my machine I have /dev/sda1 -> boot partition /dev/sda2 -> swap encrypted /dev/sda3 -> root partition encrypted and one extented partition /dev/sda5 -> encrypted . how to change the password for thesse partition or I will do that manually one-by-one ? thanks -- Klearchos-Angelos Gkountras <kleagkou(a)gmail.com>

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Bruno Wolff III

Sunday, 3 March Sun, 3 Mar

9:56 p.m.

On Sun, Mar 03, 2013 at 21:54:10 +0100, Heinz Diehl <htd(a)fritha.org> wrote:

On 03.03.2013, Klearchos-Angelos Gkountras wrote: > how to change the password for thesse partitions "cryptsetup luksAddKey" does that. > or I will do that manually one-by-one ? Yes. In fact, you can't change a LUKS password directly. First, you have to add the new password, then you can remove the old one. See option "luksKillSlot".

Note that those don't change the key used to encrypt the data. They change the keys that can be used to decrypt the actual keys. Depending on why you want to change the password, changing the key as above might not be good enough.

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Heinz Diehl

2:54 p.m.

On 03.03.2013, Klearchos-Angelos Gkountras wrote:

how to change the password for thesse partitions

"cryptsetup luksAddKey" does that.

or I will do that manually one-by-one ?

Yes. In fact, you can't change a LUKS password directly. First, you have to add the new password, then you can remove the old one. See option "luksKillSlot".

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Bruno Wolff III
Heinz Diehl
Klearchos-Angelos Gkountras