Web Servers

How To Install SSL Certificate on Apache for CentOS 7

September 15, 2019

Learn how to obtain and install SSL Certificates on Apache CentOS 7. The article explains how to use an automated certificate authority like Let’s Encrypt, a commercial Comodo certificate, and how to create a certificate of your own.

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4 Different Types of Errors in PHP

August 6, 2019

A PHP Error occurs when something is wrong in the PHP code. An error can be simple as a missing semicolon, or complex as calling an incorrect variable. To resolve a PHP issue in a script, you must understand what kind of problem is occurring. Learn about the types of errors.

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PHP Error Reporting: How to Enable & Display All Errors / Warnings


If a script is not written correctly, or if something unusual happens, PHP can generate an error message. The error message provides valuable insight and can point you in the right direction while troubleshooting. Follow the instructions in this tutorial to find out how to enable error reporting.

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How to Install Squid Proxy Server on CentOS 7

July 26, 2019

Squid Proxy specifically allows a server to cache frequently visited web pages. When a user seeks a web page or file, the request goes to the proxy server — the intermediary device between the desktop computer and the internet. The proxy server pulls the resource and relays it to the user, by caching the new data and using it for future requests made to the same server. In this guide, you will learn how to set up, configure, and install a Squid Proxy server on CentOS 7.

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How To Set or Change Time Zone/Date/Time on Ubuntu

July 10, 2019

Most modern operating systems detect and synchronize the time with the NIST time server. NIST operates an atomic clock, which it uses for the time server. However, some users may find that their system isn’t synchronizing correctly. This guide will give you several methods for updating the time, date, and timezone on an Ubuntu Linux system.

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How to Check Your Ubuntu Version

July 7, 2019

Finding out which Ubuntu version is running on your system can be important when troubleshooting issues or searching for installation guides. Also, it is essential to ensure you are not using a version which is outdated if you want to keep your computer security risks. In this tutorial, learn how to check the Ubuntu version running on your operating system.

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How to Install Ubuntu 18.04 Bionic Beaver

July 5, 2019

Ubuntu 18.04 (codenamed Bionic Beaver) is a free, open-source distribution of Linux, based on the Debian operating system. In this tutorial, learn how to install on Ubuntu 18.04. 

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How to Install Apache Tomcat 9 on Ubuntu 18.04

July 2, 2019

Apache Tomcat is a free, open-source, lightweight application server used for Java-based web applications. Developers use it to implement Java Servlet and JavaServer Pages technologies (including Java Expression Language and Java WebSocket). Read this guide to learn how to install and configure Apache Tomcat on Ubuntu 18.04.

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How to Install Node.js and NPM on CentOS 7

June 29, 2019

Node Package Manager (npm) is Node’s official package manager, used for installing and managing package dependencies. In this guide, learn how to install Node.js and npm on CentOS 7. We also cover managing multiple Node versions and install dependencies.

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How to Check Memory Usage in Linux, 5 Simple Commands

June 18, 2019

In this tutorial, learn the five most commonly used commands to check memory usage in Linux. We also provide with detailed explanations of what they do and more importantly, how to interpret the results. The commands will work with nearly all distributions. In this instance, the commands and the results are presented using Ubuntu 18.04

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