userdb command not found

Introduction

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

userdb: command not found

or when using sudo you get the following error message

sudo: userdb: command not found

Solutions to userdb: command not found

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

In Ubuntu userdb is provided by courier-authlib-userdb package.

courier-authlib-userdb is:

This package contains the userdb support for the Courier authentication library. Userdb is a simple way to manage virtual mail accounts using a GDBM-based database file.

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

sudo apt-get -y install courier-authlib-userdb

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

You can also use apt command to install courier-authlib-userdb.

sudo apt -y install courier-authlib-userdb

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

sudo aptitude install courier-authlib-userdb

Summary

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