ipsec command not found

In this troubleshooting guide we learn how to fix ipsec command not found error message

Introduction

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

ipsec: command not found

or when using sudo you get the following error message

sudo: ipsec: command not found

Solutions to ipsec: command not found

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

In Ubuntu ipsec is provided by libreswan package.

libreswan is:

Libreswan is an IPsec implementation for Linux. It has support for most of the extensions (RFC + IETF drafts) related to IPsec, including IKEv2, X.509 Digital Certificates, NAT Traversal, and many others.

Libreswan has been forked from Openswan 2.6.38, which was forked from FreeS/WAN 1.99.

The Libreswan IKE daemon is named pluto. It was inherited from the FreeS/WAN project, but provides improved X.509 certificate support and other features.

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

sudo apt-get -y install libreswan

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

You can also use apt command to install libreswan.

sudo apt -y install libreswan

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

sudo aptitude install libreswan

Summary

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