Package Management

Common Problems 114011

RHEL 10 – subscription-manager repositories disabled unexpectedly – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 5 August 2026 Affected versions: RHEL 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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Common Problems 115905

Ubuntu 26.04 LTS – Broken dependencies after interrupted upgrade – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 4 August 2026 Affected versions: Ubuntu 26.04 LTS 📖 ~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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How to Configure PHP-FPM with Nginx on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Configure PHP-FPM with Nginx on Ubuntu 26.04

PHP-FPM (FastCGI Process Manager) is the recommended way to run PHP behind Nginx. It manages PHP worker processes efficiently, supports dynamic/static/ondemand process management, and provides per-pool configuration for multi-tenant servers. This guide configures PHP-FPM 8.4 with Nginx on Ubuntu 26.04 LTS. Tested and valid on: Ubuntu 26.04 LTS Prerequisites Ubuntu 26.04 LTS with Nginx installed […]

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How to Configure Nginx Server Blocks (Virtual Hosts) on Ubuntu 26.04 — step-by-step Linux tutorial on Progressive Robot

How to Install OpenLiteSpeed Web Server on Ubuntu 26.04

OpenLiteSpeed (OLS) is a high-performance, event-driven open-source web server from LiteSpeed Technologies. It supports PHP via LiteSpeed SAPI (LSPHP) and includes a built-in WebAdmin GUI. It is significantly faster than Apache for PHP workloads and is a popular choice for WordPress hosting. This guide installs and configures OLS on Ubuntu 26.04 LTS. Tested and valid […]

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How to Set Up iSCSI Initiator on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Set Up iSCSI Initiator on SLES 16

Introduction This tutorial covers How to Set Up iSCSI Initiator 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 […]

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NetBSD 10.0 — mold — vulnerability — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — mold — 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-2026-3994 Upstream summary: pkgsrc audit-packages flagged mold-[0-9]* for vulnerability class 'heap-overflow'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-3994 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis […]

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How to Set Up VLANs on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Set Up VLANs on SLES 16

Introduction This tutorial covers How to Set Up VLANs 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 […]

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Common Problems 114462

RHEL 9 Yum Alias Scripts Break After Migration to DNF

🟡 Medium   ⏱ 5–30 min  Last verified: 3 August 2026 📖 ~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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NetBSD 10.0 — php-concrete-cms — multiple vulnerabilities (13 CVEs) — patch and remediation guide — diagnosis and fix on NetBSD 10.0

NetBSD 10.0 — php-concrete-cms — multiple vulnerabilities (13 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: NetBSD 10.0 📖 ~4 min read  •  Source: pkgsrc audit-packages entry Related CVEs: CVE-2026-3452 CVE-2024-2753 CVE-2024-3178 CVE-2024-3179 CVE-2024-3180 CVE-2024-3181 CVE-2025-8571 CVE-2025-8573  +5 more Upstream summary: pkgsrc audit-packages flagged php{56,74,81,82,83,84}-concrete-cms<9.4.8 for vulnerability class 'code-execution'. Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-3452 Table of contents Symptom & Impact Environment […]

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How to Install Prometheus and Grafana on SLES 16 — step-by-step SUSE Linux Enterprise 16 tutorial on Progressive Robot

How to Install Prometheus and Grafana on SLES 16

Introduction This tutorial covers How to Install Prometheus and Grafana 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 — Install Prometheus zypper install -y golang-github-prometheus-prometheus Step 2 […]

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