How to install DNS server on RHEL 8 / CentOS 8 Linux

This guide will show how to install and configure a DNS Server in RHEL 8 / CentOS 8 in caching mode only or as single DNS Server, no master-slave configuration. A reverse and forward zone example is provided.

In this tutorial you will learn:

  • How to install a DNS server in RHEL 8 / CentOS 8
  • How to configure a server as caching only DNS Server
  • How to configure a server as single DNS Server

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Asterisk systemd service startup output

How to install asterisk on RHEL 8 / CentOS 8 Linux

This article will describe how to install the open source communication software Asterisk on RHEL 8 / CentOS 8; due to the fact that Asterisk and other important dependencies are not available as RPM packages from the repositories, it is needed to compile them from sources.

In this tutorial you will learn:

  • Which are the pre-requisites to install Asterisk
  • How to compile Asterisk from sources
  • How to start Asterisk
  • How to reconfigure or remove Asterisk
  • How to access Asterisk command line interface

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Updating packages list from the local repos.

How to create a Ubuntu repository server

This guide will show how to configure a local repository server based on Ubuntu Bionic, but it can be adapted to a previous version of Ubuntu or even to any distribution using Aptitude as the main package management system, like Debian or Mint. You might typically want to setup a local repository to save Internet bandwidth.

In this tutorial you will learn:

  • How to install the required software on the server
  • How to select which repositories to mirror on the server
  • How to mirror selecting repositories locally on the server
  • How to configure the Linux client to use the local repository server

As stated above we are not considering a public or country mirror for this tutorial, but if you want to implement it consider that:

  • Your network bandwidth becomes very important
  • You need to register the repository to the Ubuntu list of mirrors
  • You must sync the mirror at least four times a day
  • Because you must mirror all previous versions you might need 2 TB or more of disk space

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