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How to Configure Apache mod_proxy as a Reverse Proxy on RHEL 9

• November 7, 2025
• Linux
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Apache’s mod_proxy module turns Apache into a powerful reverse proxy and gateway, forwarding requests to backend application servers, other web servers, or balancer clusters. Unlike Nginx’s reverse proxy (which is native), Apache’s proxy functionality is modular: mod_proxy handles the core proxying, mod_proxy_http handles HTTP/1.1, mod_proxy_balancer provides load balancing, and mod_proxy_wstunnel handles WebSocket tunnelling. On RHEL […]

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How to Set Up IPsec VPN with Libreswan on SLES 16

• November 6, 2025
• SUSE Linux Enterprise
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Introduction This tutorial covers How to Set Up IPsec VPN with Libreswan on SLES 16 on SLES 16. SLES 16 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 16 system is up to […]

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Debian 13 Docker Network Bridge Conflict With Host Subnet

• November 6, 2025
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 6 November 2025 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors & Cross-Refs References & Further […]

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How to Switch Default Java with alternatives on RHEL 10

• November 6, 2025
• Linux
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Introduction Setting up switch default java with alternatives on a RHEL 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Switch Default Java with alternatives on RHEL 10, with all the commands you need, the SELinux and firewalld considerations to keep in mind, and […]

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How to Install Ruby with rbenv on Oracle Linux 10

• November 6, 2025
• Oracle Linux
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Introduction This tutorial demonstrates how to Install Ruby with rbenv on Oracle Linux 10 on Oracle Linux 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 10 system with the […]

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How to Harden PHP on Oracle Linux 10

• November 6, 2025
• Oracle Linux
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Introduction This tutorial demonstrates how to Harden PHP on Oracle Linux 10 on Oracle Linux 10. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 10 system with the default AppStream […]

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How to Enable Brotli Compression in Nginx on Oracle Linux 10

• November 5, 2025
• Oracle Linux
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Introduction Oracle Linux 10 ships with a stable, security-hardened base that makes deploying enable brotli compression in nginx on oracle linux 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Enable Brotli Compression in Nginx on Oracle Linux 10, including dnf module streams where applicable, systemd unit management, and the […]

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How to Set Up ModSecurity WAF with Apache on Oracle Linux 10

• November 5, 2025
• Oracle Linux
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Introduction Setting up set up modsecurity waf with apache on oracle linux 10 on a Oracle Linux 10 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up ModSecurity WAF with Apache on Oracle Linux 10, with all the commands you need, the SELinux […]

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How to Install CouchDB on RHEL 10

• November 5, 2025
• Linux
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Introduction How to Install CouchDB on RHEL 10 on RHEL 10 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is reproducible and production-safe. […]

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Oracle Linux 10 – systemd-resolved causes intermittent DNS failures with split-DNS VPN – Fix & Prevention

• November 3, 2025
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 3 November 2025 Affected versions: Oracle Linux 10 📖 ~1 min read Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance Criteria Rollback Plan Prevention & Hardening Related Errors […]

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