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submitted 5 months ago* (last edited 5 months ago) by electro1@infosec.pub to c/linuxquestions@lemmy.zip

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I tried the following

sudo cryptsetup luksChangekey /dev/nvme0n1p3 < new passphrase >

It then asks for the Sudo password, then asks for the old passphrase, but then it prints this error message

Failed to open key file.

what went wrong ?

Edit: turns out using GNOME Disks is way more straightforward.. 😅, thank you all

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[–] booooop@hexbear.net 2 points 5 months ago (1 children)

What is the output if you run sudo cryptsetup --verbose open --test-passphrase /dev/nvme0n1p3?

[–] electro1@infosec.pub 2 points 5 months ago (1 children)

It asks for the sudo password, then it prints

No usable token is available.

Then it asks : Enter passphrase for /dev/nvme0n1p3:

After entering my old passphrase it prints:

Key slot 0 unlocked
Command Successful.

[–] booooop@hexbear.net 2 points 5 months ago (1 children)

Alright so no permission issue, what if you run the changekey command in a separate bash subprocess? sudo bash -c '($your-changekey-command-here)'

[–] electro1@infosec.pub 2 points 5 months ago

Is it like the same first "cryptsetup luksChangekey..." But inside parentheses ? Im sure I'm getting the syntax wrong.. It prints

bash: line 1: -luksChangekey: command not found