For those who seeks help in different areas of Software and Hardware platform

How To Enable Two-factor Authentication For SSH on Ubuntu 18/19/20

This tutorial will walk you through the steps to set up two-factor authentication for SSH on Ubuntu or Debian. 

Cyberthreats are increasing with the passage of time, hence securing access to your servers is critical in terms of preventing important information from being compromised.

By default, in Linux, we need a password or a key-pair authentication to log in to the server via SSH. However, there is another option that exists to further harden log in methods. A time-based one-time password allows you to enable two-factor authentication with single-use passwords that change every 30 seconds.
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How To Enable Two-factor Authentication For SSH on CentOS/RHEL 7/8

This tutorial will walk you through the steps to set up two-factor authentication for SSH on a CentOS/RHEL 7/8.

Cyberthreats are increasing with the passage of time, hence securing access to your servers is critical in terms of preventing important information from being compromised.

By default, in Linux, we need a password or a key-pair authentication to log in to the server via SSH. However, there is another option that exists to further harden log in methods. A time-based one-time password allows you to enable two-factor authentication with single-use passwords that change every 30 seconds.
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How To Backup and Restore MySQL, MariaDB Database

MySQL and MariaDB include a built-in backup utility that simplifies the process to create a backup of a database. With mysqldump, you can create a logical backup, only if your database is accessible and running.

This guide will show you how to create a backup of MySQL and MariaDB database using mysqldump utility.
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How To Backup and Restore PostgreSQL Database

If you are using PostgreSQL in a production environment, it is recommended to frequently take backups to ensure that your important data is not lost. With the backups, you will be able to quickly restore if your database is lost or corrupted. The good thing is, PostgreSQL includes tools to make database backup simple and easy to restore.

This tutorial will show you how to backup and restore your PostgreSQL database.
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How To Install Ansible AWX on CentOS/RHEL 7/8

AWX provides a web-based user interface, REST API, and task engine built on top of Ansible. This tutorial will walk you through the steps to set up Ansible AWX using Docker on a CentOS/RHEL 7/8.
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How To Set Up a Highly Available MongoDB Sharded Cluster on CentOS/RHEL 7/8

This tutorial will walk you through the steps to set up a highly available MongoDB sharded cluster on CentOS/RHEL 7/8.

A MongoDB sharded cluster consists of the following three components:

Shard that can be deployed as a replica set.
Config store metadata and configuration settings for the cluster.
Mongos acts as a query router, providing an interface between client applications and the sharded cluster.
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How To Deploy a Highly Available Fault-Tolerant MongoDB Sharded Cluster on Ubuntu 18/19/20

This tutorial will walk you through the steps to set up a highly available fault-tolerant MongoDB sharded cluster using a shared storage on Ubuntu 18, 19 and 20.04. If you are intend to use local storage, follow this tutorial.
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How To Set Up a Highly Available Multi-node Hadoop Cluster on CentOS/RHEL 7/8

This tutorial will show you how to set up a  highly available multi-node hadoop cluster on CentOS/RHEL server. Please note that, this guide is specifically written for CentOS and RHEL release 7 and 8.
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How To Set Up a Highly Available Multi-node Hadoop Cluster on Ubuntu 18/19/20

Hadoop software library is a framework that allows for the distributed processing of large data sets across clusters of computers using simple programming models. It is designed to scale up from single servers to thousands of machines, each offering local computation and storage.
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How To Install and Secure MongoDB on Ubuntu 18/19/20

MongoDB is a database engine that provides access to non-relational, document-oriented databases. This tutorial will show you how to install and configure MongoDB on Ubuntu. We will also explain on some basic features and functions of the database.

Note that, this guide is specifically written for Ubuntu 18.04, 19.04, 19.10, 20.04 and Debian 9, 10.
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How To Set Up a Multi-node MySQL Replication Cluster on Ubuntu 18/19/20

Database clustering is particularly useful for highly active website and application. With replication, at least two or more MySQL servers act as a cluster. MySQL multi-node circular replication adds speed and redundancy. 

This tutorial is written for Ubuntu 18.04.4, 19.04, 19.10, 20.04 and Debian 9, 10 using a non-root user, which means commands that require elevated privileges are prefixed with sudo.
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