hashcash command not found

Introduction

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

hashcash: command not found

or when using sudo you get the following error message

sudo: hashcash: command not found

Solutions to hashcash: command not found

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

In Ubuntu hashcash is provided by hashcash package.

hashcash is:

Hash cash is a payment scheme that uses CPU cycles as the form of payment. This can be used as a counter-measure for junk email (spam) by using the hash cash token as a proof of payment for each email that you sent.

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

sudo apt-get -y install hashcash

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

You can also use apt command to install hashcash.

sudo apt -y install hashcash

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

sudo aptitude install hashcash

Summary

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