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Changing the LUKS Passphrase for Entire System

asked 2015-08-02 11:42:52 -0500

Plant gravatar image

updated 2015-08-04 11:49:21 -0500

I have several encrypted partitions on my system and two of them are part of a RAID. There is just one passphrase to unlock the entire system. The system asks for that passphrase on boot. I wanted to change that passphrase so I went to the disk utility. The disk utility shows an option to "Change Passphrase" for each encrypted partition. So I wonder:

How is a single passphrase implemented even though there are several partitions?

How can I change that passphrase?

What happens if I change the passphrase of one partition but leave the others as they were?

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answered 2015-08-04 11:50:54 -0500

BRPocock gravatar image
  • How is a single passphrase implemented even though there are several partitions?

It kinda isn't. But the boot process will re-try what you gave, for each subsequent partition.

  • How can I change that passphrase?

Change it for each partition.

  • What happens if I change the passphrase of one partition but leave the others as they were?

You'll get multiple prompts at boot, which will be confusing, but usually non-fatal.

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Asked: 2015-08-02 11:41:29 -0500

Seen: 227 times

Last updated: Aug 04 '15