chris

How to Set Up HTTP/3 with Nginx on Debian 13 — step-by-step Debian 13 tutorial on Progressive Robot

How to Set Up HTTP/3 with Nginx on Debian 13

Introduction Debian 13 Trixie is built around the ethos of stability and free software. Setting up set up http/3 with nginx on Trixie leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Trixie freeze. Follow each step carefully and the resulting […]

Read more
How to Configure SLES 16 for Oracle Database — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure SLES 16 for Oracle Database

Introduction This tutorial covers How to Configure SLES 16 for Oracle Database 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 date: zypper refresh […]

Read more
How to Configure firewalld Zones on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure firewalld Zones on SLES 16

Introduction This tutorial covers How to Configure firewalld Zones 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 date: zypper refresh […]

Read more
How to Configure Automatic Security Updates on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Configure Automatic Security Updates on RHEL 9

Unpatched software is the leading cause of server compromise. The majority of publicly disclosed vulnerabilities already have patches available by the time attackers start actively exploiting them — the window between patch availability and active exploitation has shrunk from months to days. Manually patching servers is error-prone and inconsistent at scale. Automatic security updates ensure […]

Read more
Common Problems 127094

CentOS Stream 10 – Common Problem 188 – Diagnosis and Fix

🟡 Medium   ⏱ 5–30 min  Last verified: 6 November 2025 Affected versions: CentOS Stream 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 […]

Read more
How to Configure OpenSCAP Security Compliance on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure OpenSCAP Security Compliance on SLES 16

Introduction This tutorial covers How to Configure OpenSCAP Security Compliance 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 date: zypper […]

Read more
NetBSD 10.0 — php83-pgsql — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — php83-pgsql — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: NetBSD 10.0 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2025-1735 Upstream summary: pkgsrc audit-packages flagged php83-pgsql<8.3.23 for vulnerability class 'sql-injection'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2025-1735 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

Read more
How to Configure AppArmor Enforcement on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure AppArmor Enforcement on SLES 16

Introduction This tutorial covers How to Configure AppArmor Enforcement 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. Step 1 — Check AppArmor Status systemctl status apparmor aa-status Step 2 […]

Read more
How to Configure AIDE File Integrity Monitoring on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Configure AIDE File Integrity Monitoring on SLES 16

Introduction This tutorial covers How to Configure AIDE File Integrity Monitoring 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 date: […]

Read more
Common Problems 124168

Oracle Linux 10 – Postfix starts but mail remains deferred due to SELinux policy denial – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 6 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 […]

Read more
CHAT