grlearn command not found

Introduction

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

grlearn: command not found

or when using sudo you get the following error message

sudo: grlearn: command not found

Solutions to grlearn: command not found

How To Fix grlearn: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu grlearn is provided by gradm2 package.

gradm2 is:

Used to manage the RBAC based ACL system of grsecurity2. Please note that you will need a specially patched kernel for grsecurity to work (see the kernel-patch-grsecurity2 Debian package). You can find more information about grsecurity at http://www.grsecurity.net/

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

sudo apt-get -y install gradm2

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

You can also use apt command to install gradm2.

sudo apt -y install gradm2

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

sudo aptitude install gradm2

Summary

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