webapp

php-modules-rhel8

How to install php on RHEL 8 / CentOS 8 Linux

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In the RHEL 8 / CentOS 8 Linux systems, the way software is organized has changed: critical packages are now contained in the BaseOs repository, while the AppStream one contains multiple versions of some of the most common used applications and programming languages which are organized in modules, and updated independently of the distribution release cycle. This strategy has been adopted in order to avoid the problem of being stuck with a certain, too outdated or too recent release of a certain software.

In this tutorial you will learn:

  • How to install PHP on RHEL 8 / CentOS 8
  • What are software modules in RHEL 8 / CentOS 8
  • How to install and switch between different versions of the PHP module
php-modules-rhel8

Available php modules on RHEL 8

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phpmyadmin-login-page

How to install phpMyAdmin on RHEL 8 / CentOS 8

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PhpMyAdmin is a php web application which let us manage a MariaDB/MySQL database from an intuitive graphical interface. The application is not provided in the RHEL 8 / CentOS 8 official repositories, and is usually installed from third party sources like EPEL. Epel-8 is, however, not yet available, so in this tutorial we will see how to fetch the upstream phpMyAdmin code and install it on our system “manually”.

In this tutorial you will learn:

  • How to download and install phpMyAdmin from source
  • How to verify the downloaded archive
  • How to access the phpMyAdmin configuration wizard

phpmyadmin-login-page

The phpMyAdmin login page

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Configuration page of Redmine.

How to install redmine on RHEL 8 / CentOS 8 Linux

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Redmine is a popular open source project management web application. It supports mayor databases like MySQL and PostgreSQL as backend, and you can also change the frontend to Apache from the WEBrick (recommended for production use) webserver shipped with the installation. In this article we will install the latest Redmine on RHEL 8 / CentOS 8, using PostgreSQL as backend, but we will leave the default WEBrick as frontend, which will serve our tests perfectly.

Do not expect this process to be an easy one, nor error-free. Even following these steps to the letter, some errors will surely happen, the setup seem to handle sudo steps somewhat inconsistently – but the solutions are also included which will guide trough these errors.

In this tutorial you will learn:

  • How to install required operating system packages
  • How to setup the database
  • How to install the Redmine application
  • How to start and login to the application

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HDFS Architecture

How to install Hadoop on RHEL 8 / CentOS 8 Linux

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Apache Hadoop is an open source framework used for distributed storage as well as distributed processing of big data on clusters of computers which runs on commodity hardwares. Hadoop stores data in Hadoop Distributed File System (HDFS) and the processing of these data is done using MapReduce. YARN provides API for requesting and allocating resource in the Hadoop cluster.

The Apache Hadoop framework is composed of the following modules:

  • Hadoop Common
  • Hadoop Distributed File System (HDFS)
  • YARN
  • MapReduce

This article explains how to install Hadoop Version 2 on RHEL 8 or CentOS 8. We will install HDFS (Namenode and Datanode), YARN, MapReduce on the single node cluster in Pseudo Distributed Mode which is distributed simulation on a single machine. Each Hadoop daemon such as hdfs, yarn, mapreduce etc. will run as a separate/individual java process.

In this tutorial you will learn:

  • How to add users for Hadoop Environment
  • How to install and configure the Oracle JDK
  • How to configure passwordless SSH
  • How to install Hadoop and configure necessary related xml files
  • How to start the Hadoop Cluster
  • How to access NameNode and ResourceManager Web UI

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HAProxy Architecture

Install and Configure HAProxy on RHEL 8 / CentOS 8 Linux

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HAProxy or High Availability Proxy is an open source TCP and HTTP load balancer and proxy server software. HAProxy has been written by Willy Tarreau in C, it supports SSL, compressions, keep-alive, custom log formats and header rewriting. HAProxy is a fast and lightweight proxy server and load balancer with a small memory footprint and low CPU usage. It is used by large sites like Github, StackOverflow, Reddit, Tumblr, Twitter and others. It has become the most popular software load balancer and proxy server in the past years.

In this tutorial, you will get through the HAProxy installation and configuration on RHEL 8 / CentOS 8. We will install HAProxy on a single server and then install Nginx web server on the other servers. HAProxy will act as a load balancer for the Nginx web servers.

In this tutorial you will learn:

  • HAProxy Architecture and Concepts
  • Configure hosts file for name resolution
  • Install and Configure HAProxy
  • Install and Configure Nginx
  • Testing the Load Balancing feature
  • Access the HAProxy Stats URL

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Examples page served by Apache Tomcat

How to install apache tomcat on Linux RHEL 8 / CentOS 8

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In this tutorial we will learn how to install Apache Tomcat 8 application container to RHEL 8 / CentOS 8. We will be using the zip package available to download from the Apache Tomcat website. As this package will not handle setting up the environment, we will create it from the command line.

In this tutorial you will learn:

  • How to install Apache Tomcat from zip file
  • How to create the environment for the Tomcat server from command line
  • How to add basic service file to systemd
  • How to enable autostart, start and stop the Tomcat server
  • How to verify Tomcat is reachable

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Install Drupal Ubuntu 18.04 - Select Language

Install Drupal on Ubuntu 18.04 Bionic Beaver Linux

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Objective

The objective is to install Drupal on Ubuntu 18.04 Bionic Beaver Linux

Operating System and Software Versions

  • Operating System: – Ubuntu 18.04 Bionic Beaver
  • Software: – Drupal 8.4.5 or higher

Requirements

Privileged access to your Ubuntu System as root or via sudo command is required.

Difficulty

EASY

Conventions

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Add MongoDB Source On Ubuntu 18.04

Install The MEAN Stack On Ubuntu 18.04 Bionic Beaver Linux

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Objective

Install the MEAN stack on Ubuntu 18.04

Distributions

Ubuntu 18.04

Requirements

A working install of Ubuntu 18.04 with root privileges

Difficulty

Easy

Conventions

  • # – requires given linux commands to be executed with root privileges either directly as a root user or by use of sudo command
  • $ – requires given linux commands to be executed as a regular non-privileged user

Introduction

The MEAN stack is quickly becoming a favorite among web developers. MEAN stands for MongoDB, ExpressJS, AngularJS, and NodeJS. Clearly, this is a JavaScript heavy tech stack, so it’s not for people who don’t like JS. However, it does provide an excellent framework for building lightweight and fully capable web applications.

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joomla-logo

How to install Joomla on Ubuntu 18.04 Bionic Beaver Linux

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Objective

The objective of this tutorial is to obtain a working Joomla installation based on a Lamp environment built on Ubuntu 18.04 Bionic Beaver.

Requirements

  • Root permissions

Difficulty

MEDIUM

Conventions

  • # – requires given linux commands to be executed with root privileges either
    directly as a root user or by use of sudo command
  • $ – requires given linux commands to be executed as a regular non-privileged user

Introduction

joomla-logo
Joomla is one of the most famous CMS (Content Management System): it is an open source project, released under the GPL license and, according to its developers, it powers over 2 Million websites, and it is translated in 74 languages. In this tutorial we will walk through the Joomla installation in a LAMP environment, built on Ubuntu 18.04 Bionic Beaver.

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