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
What is the output if you run
sudo cryptsetup --verbose open --test-passphrase /dev/nvme0n1p3?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.Alright so no permission issue, what if you run the changekey command in a separate bash subprocess?
sudo bash -c '($your-changekey-command-here)'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