do-release-upgrade command not found

In this troubleshooting guide we learn how to fix do-release-upgrade command not found error message

Introduction

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

do-release-upgrade: command not found

or when using sudo you get the following error message

sudo: do-release-upgrade: command not found

In Ubuntu do-release-upgrade is provided by ubuntu-release-upgrader-core package.

ubuntu-release-upgrader-core is:

This is the core of the Ubuntu Release Upgrader

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

sudo apt-get -y install ubuntu-release-upgrader-core

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

You can also use apt command to install ubuntu-release-upgrader-core.

sudo apt -y install ubuntu-release-upgrader-core

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

sudo aptitude install ubuntu-release-upgrader-core

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