firewalld command not found

Introduction

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

firewalld: command not found

or when using sudo you get the following error message

sudo: firewalld: command not found

Solutions to firewalld: command not found

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

In Ubuntu firewalld is provided by firewalld package.

firewalld is:

firewalld is a dynamically managed firewall daemon with support for network/firewall zones to define the trust level of network connections or interfaces. It has support for IPv4, IPv6 firewall settings and for ethernet bridges and has a separation of runtime and persistent configuration options. It also provides a D-Bus interface for services or applications to add and apply firewall rules on-the-fly.

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

sudo apt-get -y install firewalld

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

You can also use apt command to install firewalld.

sudo apt -y install firewalld

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

sudo aptitude install firewalld

Summary

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