Red Hat Enterprise Linux

How to Configure Nginx Rate Limiting and Connection Throttling on RHEL 8

• August 31, 2019
• Linux
• Comment off

Rate limiting and connection throttling are essential defences against brute-force attacks, credential stuffing, and high-volume web scrapers. Nginx provides two built-in modules — ngx_http_limit_req_module for request-rate limiting and ngx_http_limit_conn_module for connection limiting — both compiled into the default binary. On RHEL 8 these capabilities are available immediately after installing Nginx from the AppStream module stream […]

Read more

How to Deploy a Spring Boot Application on RHEL 8

• August 30, 2019
• Linux
• Comment off

Spring Boot is the most popular framework for building production-ready Java applications, and RHEL 8 provides an excellent foundation for running them as long-lived services. In this tutorial you will create a Spring Boot application using Maven, package it into a self-contained executable JAR, configure it to run as a systemd service with a dedicated […]

Read more

How to Configure DNSSEC on RHEL 7

• August 29, 2019
• Linux
• Comment off

How to Configure DNSSEC on RHEL 7 DNS Security Extensions (DNSSEC) add a layer of cryptographic verification to the Domain Name System, protecting users from cache poisoning attacks, man-in-the-middle redirects, and forged DNS responses. By digitally signing DNS zone data, DNSSEC allows resolvers to confirm that the records they receive are authentic and unmodified. This […]

Read more

How to Monitor Nginx Access Logs with GoAccess on RHEL 8

• August 24, 2019
• Linux
• Comment off

GoAccess is an open-source, real-time web log analyzer that generates interactive HTML reports and live terminal dashboards directly from Nginx access logs. It requires no database, no JavaScript framework, and no persistent service — a single command can parse millions of log entries in seconds. On RHEL 8 the package is available from the EPEL […]

Read more

How to Install Java (OpenJDK) on RHEL 8

• August 23, 2019
• Linux
• Comment off

Java is one of the most widely used programming languages in enterprise software, and RHEL 8 makes it straightforward to install and manage multiple Java versions through its built-in package manager. Whether you are building web applications, microservices, or command-line tools, having a proper Java development environment is the first step. In this tutorial you […]

Read more

How to Configure Kubernetes Persistent Volumes and Storage Classes on RHEL 8

• August 21, 2019
• Linux
• Comment off

Stateful applications running in Kubernetes — databases, content management systems, message queues — need storage that persists beyond the lifecycle of any individual pod. Kubernetes solves this through two complementary abstractions: PersistentVolumes (PV), which represent actual storage capacity provisioned by an administrator or a storage provider, and PersistentVolumeClaims (PVC), which are requests for storage made […]

Read more

How to Install and Configure Postfix Mail Server on RHEL 8

• August 17, 2019
• Linux
• Comment off

Postfix is a high-performance, security-focused Mail Transfer Agent (MTA) that ships with RHEL 8 and is the default replacement for Sendmail. It handles the delivery of outbound email and, when configured correctly, accepts inbound mail for local users. Understanding Postfix is foundational for any RHEL administrator who needs to send system alerts, application notifications, or […]

Read more

How to Install MariaDB on RHEL 8

• August 16, 2019
• Linux
• Comment off

MariaDB is a community-developed, fully open-source relational database management system that was forked from MySQL and remains highly compatible with it. On RHEL 8, MariaDB is conveniently available through the AppStream module system, allowing you to install a specific stream version without adding third-party repositories. This tutorial covers installing MariaDB 10.5 via AppStream, starting and […]

Read more

How to Set Up Varnish Cache as a Reverse Proxy on RHEL 7

• August 14, 2019
• Linux
• Comment off

How to Set Up Varnish Cache as a Reverse Proxy on RHEL 7 Varnish Cache is a high-performance HTTP reverse proxy and caching accelerator designed to sit in front of your web server. When a visitor requests a page, Varnish checks whether it holds a fresh cached copy. If it does, the response is served […]

Read more

How to Audit Linux Security with Lynis on RHEL 7

• August 13, 2019
• Linux
• Comment off

How to Audit Linux Security with Lynis on RHEL 7 Maintaining a secure Linux server requires more than installing updates and setting strong passwords. A comprehensive security audit reveals configuration weaknesses, missing hardening measures, and potential vulnerabilities before attackers can exploit them. Lynis is an open-source security auditing tool that performs an in-depth scan of […]

Read more