mongrel2 command not found

Introduction

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

mongrel2: command not found

or when using sudo you get the following error message

sudo: mongrel2: command not found

Solutions to mongrel2: command not found

How To Fix mongrel2: command not found in Ubuntu / Debian / Kali Linux / Raspbian

In Ubuntu mongrel2 is provided by mongrel2-core package.

mongrel2-core is:

Mongrel2 is an application, programming language, and network architecture agnostic web server that focuses on web applications using modern browser technologies.

Mongrel2 supports 17 languages and platforms, HTTP, Flash sockets, WebSockets, Long Polling, and many ways to deploy and hack on it.

This package includes the server binaries but doesn’t contain all the infrastructure needed to setup a standalone web server.

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

sudo apt-get -y install mongrel2-core

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

You can also use apt command to install mongrel2-core.

sudo apt -y install mongrel2-core

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

sudo aptitude install mongrel2-core

Summary

In this tutorial we learn how to fix mongrel2 command not found error in Ubuntu / Debian / Kali Linux or Raspbian distribution.