firemon command not found

Introduction

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

firemon: command not found

or when using sudo you get the following error message

sudo: firemon: command not found

Solutions to firemon: command not found

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

In Ubuntu firemon is provided by firejail package.

firejail is:

Firejail is a SUID security sandbox program that reduces the risk of security breaches by restricting the running environment of untrusted applications using Linux namespaces and seccomp-bpf. It allows a process and all its descendants to have their own private view of the globally shared kernel resources, such as the network stack, process table, mount table.

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

sudo apt-get -y install firejail

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

You can also use apt command to install firejail.

sudo apt -y install firejail

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

sudo aptitude install firejail

Summary

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