key.dns_resolver command not found

Introduction

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

key.dns_resolver: command not found

or when using sudo you get the following error message

sudo: key.dns_resolver: command not found

Solutions to key.dns_resolver: command not found

How To Fix key.dns_resolver: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu key.dns_resolver is provided by keyutils package.

keyutils is:

Keyutils is a set of utilities for managing the key retention facility in the kernel, which can be used by filesystems, block devices and more to gain and retain the authorization and encryption keys required to perform secure operations.

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

sudo apt-get -y install keyutils

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

You can also use apt command to install keyutils.

sudo apt -y install keyutils

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

sudo aptitude install keyutils

Summary

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