CentOS

Introduction> Introduction # WordPress is a free and open source website and blogging tool that uses PHP and MySQL. WordPress is currently the most popular CMS (Content Management System) on the Internet, and has over 20,000 plugins to extend its functionality.

The author selected the Open Source Initiative to receive a donation as part of the Write for DOnations program. Introduction> Introduction # Zabbix is open-source monitoring software for networks and applications.

Introduction> Introduction # Apache Tomcat is a web server and servlet container that is used to serve Java applications. Tomcat is an open source implementation of the Java Servlet and JavaServer Pages technologies, released by the Apache Software Foundation.

Introduction> Introduction # Nginx is a popular high-performance web server. This tutorial will teach you how to install and start Nginx on your CentOS 7 server. Prerequisites> Prerequisites # The steps in this tutorial require a non-root user with sudo privileges.

Introduction> Introduction # Like most other Linux distributions, CentOS 7 uses the netfilter framework inside the Linux kernel in order to access packets that flow through the network stack. This provides the necessary interface to inspect and manipulate packets in order to implement a firewall system.

Status: Deprecated> Status: Deprecated # This article covers a version of CentOS that is no longer supported. If you are currently operating a server running CentOS 6, we highly recommend upgrading or migrating to a supported version of CentOS.

Status: Deprecated> Status: Deprecated # This article covers a version of CentOS that is no longer supported. If you are currently operating a server running CentOS 6, we highly recommend upgrading or migrating to a supported version of CentOS.

Status: Deprecated> Status: Deprecated # This article covers a version of CentOS that is no longer supported. If you are currently operating a server running CentOS 6, we highly recommend upgrading or migrating to a supported version of CentOS.

Introduction> Introduction # Node.js is an open source Javascript runtime environment for easily building server-side and networking applications. The platform runs on Linux, OS X, FreeBSD, and Windows, and its applications are written in JavaScript.

Introduction> Introduction # Docker is an application that makes it simple and easy to run application processes in a container, which are like virtual machines, only more portable, more resource-friendly, and more dependent on the host operating system.

Introduction> Introduction # Relational database management systems are a key component of many web sites and applications. They provide a structured way to store, organize, and access information. PostgreSQL, or Postgres, is a relational database management system that provides an implementation of the SQL querying language.

Introduction> Introduction # MySQL comes with a handy little diagnostic tool called mysqlslap that’s been around since version 5.1.4. It’s a benchmarking tool that can help DBAs and developers load test their database servers.

Introduction> Introduction # Linux system administrators often need to look at log files for troubleshooting purposes. This is one of the first things a sysadmin would do. Linux and the applications that run on it can generate all different types of messages, which are recorded in various log files.

The author selected the Free and Open Source Fund to receive a donation as part of the Write for DOnations program. Introduction> Introduction # In this tutorial you will use systemd to configure MySQL to restart automatically after a reboot or crash.

Brief Introduction to Entropy and Randomness> Brief Introduction to Entropy and Randomness # The Linux pseudo random number generator (PRNG) is a special device that generates randomness from hardware interrupts (keyboard, mouse, disk/network I/O) and other operating system sources.

Introduction> Introduction # In this tutorial, we will cover the installation of Nagios 4, a very popular open source monitoring system, on CentOS 7 or RHEL 7. We will cover some basic configuration, so you will be able to monitor host resources via the web interface.

Introduction> Introduction # Apache Tomcat is a web server and servlet container that is used to serve Java applications. Tomcat is an open source implementation of the Java Servlet and JavaServer Pages technologies, released by the Apache Software Foundation.

Introduction> Introduction # The ability to send e-mail alerts is essential for the day to day management of any VPS. For system administrators (and users alike), being able to take advantage of this [new] possibility not only makes things easier, but also provides you with many allies in your combat against thieves or downtime with triggers you can create.

Introduction> Introduction # The Linux Auditing System helps system administrators create an audit trail, a log for every action on the server. We can track security-relevant events, record the events in a log file, and detect misuse or unauthorized activities by inspecting the audit log files.

Status: Deprecated> Status: Deprecated # This article covers a version of CentOS that is no longer supported. If you are currently operating a server running CentOS 6, we highly recommend upgrading or migrating to a supported version of CentOS.