Remove Cryptsetup Passphrase

You need to identify the correct partition for the passphrase changes. Visit the following link if you need the know how.

Now that you got your device name, it's time to remove the passphrase for that encrypted partition. In this example, we will be using sda5 as our dummy device. There are 2 ways to do it.

The command is:

$ cryptsetup luksRemoveKey /path/to/device

Based on our example, it is:

$ cryptsetup luksRemoveKey /dev/sda5