yubikey-agent command not found

Introduction

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

yubikey-agent: command not found

or when using sudo you get the following error message

sudo: yubikey-agent: command not found

Solutions to yubikey-agent: command not found

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

In Ubuntu yubikey-agent is provided by yubikey-agent package.

yubikey-agent is:

yubikey-agent is an easy to use ssh-agent for YubiKeys, written in Go. The key is generated on the YubiKey and can’t be extracted. Every session requires the PIN, every login requires a touch. The setup takes care of the PUK and the management key.

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

sudo apt-get -y install yubikey-agent

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

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

sudo apt -y install yubikey-agent

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

sudo aptitude install yubikey-agent

Summary

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