popauth command not found

Introduction

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

popauth: command not found

or when using sudo you get the following error message

sudo: popauth: command not found

Solutions to popauth: command not found

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

In Ubuntu popauth is provided by mailutils-pop3d package.

mailutils-pop3d is:

GNU Mailutils is a rich and powerful protocol-independent mail framework. It contains a series of useful mail libraries, clients, and servers.

The GNU mailutils POP3 daemon supports the basic POP3 protocol with the CAPA, RESP-CODES, PIPELINING and UIDL extensions. It also supports APOP authentication. The user credentials for APOP can be stored in a variety of DBM formats. It is able to get the authentication information from the system user database as well as from a SQL database of arbitrary structure. The PAM framework can also be used for authentication purposes. Additionally, mailutils pop3d supports virtual mail domains and has TLS support via GNUtls. GNU mailutils supports the mbox, MH, Maildir and dotmail mailbox formats.

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

sudo apt-get -y install mailutils-pop3d

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

You can also use apt command to install mailutils-pop3d.

sudo apt -y install mailutils-pop3d

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

sudo aptitude install mailutils-pop3d

Summary

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