A virtual private network, or VPN, allows you to securely encrypt traffic as it travels through untrusted networks, such as those at the coffee shop, a conference, or an airport. In this tutorial, you'll set up an IKE...

Neo4j is a graph database that records relationships between data nodes, whereas traditional relational databases use rows and columns to store and structure data. Since each node stores references to all the other no...

An Apache AH00558: Could not reliably determine the server's fully qualified domain name message is generated when Apache is not configured with a global ServerName directive. The message is mainly for informational p...

An Apache AH02572: Failed to configure at least one certificate and key error message is generated when Apache is configured to use the ssl module, but is missing a TLS/SSL public certificate and corresponding private...

There are three main commands, and a set of common log locations that you can use to get started troubleshooting Apache errors. Generally when you are troubleshooting Apache, you will use these commands in the order i...

This error is encountered when the there is a typo or mis-configured setting in your Apache configuration files. It is a generic error that can be indicative of a number of underlying problems. The error can be detect...

An Apache AH00072: make_sock: could not bind to address error message is generated when there is another process listening on the same port that Apache is configured to use. Typically the port will be the standard por...

When setting up infrastructure, getting your applications up and running will often be your primary concern. However, making your applications to function correctly without addressing the security needs of your infras...

In this guide, you will build a Python application using the Flask microframework on Ubuntu 20.04. The majority of this tutorial is about how to set up the Gunicorn application server to run the application and how t...

OpenVPN is an open-source Virtual Private Network (VPN) application that lets you create and join a private network securely over the public Internet. In this tutorial you will learn how to install and configure OpenV...

A private Certificate Authority that runs on Ubuntu 20.04 will enable you to configure, test, and run programs that require encrypted connections between a client and a server. Using a private CA, you can issue certif...

OpenVPN is an open-source Virtual Private Network (VPN) application that lets you create and join a private network securely over the public Internet. In this tutorial you will learn how to install and configure OpenV...

Building a Certificate Authority (CA) will enable to you configure, test, and run programs that require encrypted connections between a client and server. With a private CA, you can issue certificates for users, serve...

Building a private Certificate Authority on Debian 10 will enable you to configure, test, and run programs that require encrypted connections between a client and a server. With a private CA, you can issue certificate...

Velero is a convenient backup tool for Kubernetes clusters that compresses and backs up Kubernetes objects to object storage. It also takes snapshots of your cluster’s Persistent Volumes using your cloud provider’s bl...