rblcheck command not found

In this troubleshooting guide we learn how to fix rblcheck command not found error message

Introduction

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

rblcheck: command not found

or when using sudo you get the following error message

sudo: rblcheck: command not found

Solutions to rblcheck: command not found

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

In Ubuntu rblcheck is provided by rblcheck package.

rblcheck is:

This program is a very basic interface to DNS Blackhole Lists. The basic idea of the filter is that when someone is blacklisted for email abuse of some sort, a new domain name is resolved of the form “2.0.0.127.domain.name.com”, where 2.0.0.127 is the abusive IP address in reverse (for example, 2.0.0.127 would be the IP address 127.0.0.2), and “domain.name.com” is the base domain name of the filtering service.

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

sudo apt-get -y install rblcheck

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

You can also use apt command to install rblcheck.

sudo apt -y install rblcheck

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

sudo aptitude install rblcheck

Summary

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