cufilter command not found

Introduction

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

cufilter: command not found

or when using sudo you get the following error message

sudo: cufilter: command not found

Solutions to cufilter: command not found

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

In Ubuntu cufilter is provided by libmail-checkuser-perl package.

libmail-checkuser-perl is:

Mail::CheckUser provides routines for quickly checking the validity of email addresses. It carries out the following checks:

* syntax of the email address
* existence of MX or A records for the domain part (optional)
* direct connection via SMTP simulating email delivery with MAIL
  and RCPT (optional)

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

sudo apt-get -y install libmail-checkuser-perl

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

You can also use apt command to install libmail-checkuser-perl.

sudo apt -y install libmail-checkuser-perl

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

sudo aptitude install libmail-checkuser-perl

Summary

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