Sockets are a way to enable inter-process communication between programs running on a server, or between programs running on separate servers. Communication between servers relies on network sockets, which use the Int...

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...

Security Enhanced Linux (SELinux) is an access control system that is built into the Linux kernel. It is used to enforce policies that define which resources users, programs and services can use on a system. In its de...

Many Linux distributions use systemd to manage system settings and services. systemd organizes tasks into components called units, and groups of units into targets, that can be used to create dependencies on other sys...

When building modern, stateless applications, containerizing your application’s components is the first step in deploying and scaling on…

You may encounter an HAProxy Setting tune.ssl.default-dh-param to 1024 by default warning message if your HAProxy server is configured with an SSL/TLS certificate and key, but there isn’t a value set for the tune.ssl....

An HAProxy cannot bind socket error message is generated when there is another process listening on the same interface and TCP port combination that HAProxy is configured to use, or when HAProxy attempts to use an IP ...

There are three main commands, and a common log location that you can use to get started troubleshooting HAProxy errors. Generally when you are troubleshooting HAProxy, you will use these commands in the order indicat...

By default on many CentOS 8 installations, HAProxy is not configured to write its log output to a file. This quickstart tutorial will explain how to configure HAProxy logging with Rsyslog and SELinux rules by using a ...

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...