yubikey-luks-open command not found

Introduction

When you run more command in linux terminal / console, you get the following error message

yubikey-luks-open: command not found

or when using sudo you get the following error message

sudo: yubikey-luks-open: command not found

Solutions to yubikey-luks-open: command not found

How To Fix yubikey-luks-open: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu yubikey-luks-open is provided by yubikey-luks package.

yubikey-luks is:

With this extension to the initramfs-tools, you can unlock a LUKS encrypted disk using your YubiKey as a second factor.

The challenge-response mechanism of the YubiKey is used to generate a response based on a PIN/password you have to enter.

Only the combination of the correct password and the matching YubiKey will generate a response, that is a valid key of the LUKS disk. Alternatively you can use any other LUKS passphrase when the YubiKey is not present.

To fix this problem, we can install more using the command below.

sudo apt-get -y install yubikey-luks

This command might take some time to finish depending on your machine internet connection.

You can also use apt command to install yubikey-luks.

sudo apt -y install yubikey-luks

Or if you have aptitude installed you can use the following command.

sudo aptitude install yubikey-luks

Summary

In this tutorial we learn how to fix yubikey-luks-open command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.