The default relational SQL database on RHEL 8 / CentOS 8 Linux has been chnaged from MySQL to MariaDB. MariaDB is a community-developed fork of the MySQL relational database and in-place substitute for MySQL.

In this tutorial you will learn:
  • How to install MariaDB/MySQL server
  • How to start and enable MariaDB to start automatically after reboot
  • How to secure MariaDB database and set root password
  • How to create database for a remote access
  • How to open MySQL/MariaDB firewall ports for incoming traffic
  • How to login to MySQL/MariaDB from a remote host

There are a few different ways that you can install an RPM package on RHEL 8 / CentOS 8 as oppose to package installation from a systems repository. They each have their own merits, but DNF should probably be your first choice in most situations. It's also good to remember that, for stability's sake, it's a good idea to limit your external RPM installs as much as possible.

In this tutorial you will learn:
  • How to Install an RPM with DNF
  • How to Install an RPM with Yum
  • How to Install an RPM with RPM

Java is incredibly popular on servers, and if you plan on using RHEL 8 / CentOS 8, you'll need to install it. There are a couple of ways to install Java on RHEL, both from the open source OpenJDK packages and directly from Oracle.

In this tutorial you will learn:
  • How to Install OpenJDK 8
  • How to Install OpenJDK 11
  • How to Install Oracle Java 8 JRE
  • How to Install Oracle Java 8 JDK
  • How to Switch Java Versions

In this part of RHCSA exam preparation you will learn how to manually change into a different boot targets. This article will also teach you how to set a default boot targets to automatically boot into graphical or multi-user target on Red Hat Enterprise Linux system.

In this tutorial you will learn:
  • How to check default boot target
  • How to manually switch between different targets
  • How to set default boot to multi-user target
  • How to set default boot to graphical target

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