feersum command not found

Introduction

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

feersum: command not found

or when using sudo you get the following error message

sudo: feersum: command not found

Solutions to feersum: command not found

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

In Ubuntu feersum is provided by feersum package.

feersum is:

Feersum is an HTTP server built on EV. It fully supports the PSGI 1.03 spec including the psgi.streaming interface and is compatible with Plack and PSGI 1.1. Feersum also has its own “native” interface which is similar in a lot of ways to PSGI, but is not compatible with PSGI or PSGI middleware.

Feersum uses a single-threaded, event-based programming architecture to scale and can handle many concurrent connections efficiently in both CPU and RAM. It skips doing a lot of sanity checking with the assumption that a “front-end” HTTP/HTTPS server is placed between it and the Internet.

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

sudo apt-get -y install feersum

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

You can also use apt command to install feersum.

sudo apt -y install feersum

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

sudo aptitude install feersum

Summary

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