DNS

How to Install ClickHouse on RHEL 10 — step-by-step RHEL 10 tutorial on Progressive Robot

How to Install ClickHouse on RHEL 10

Introduction How to Install ClickHouse 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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How to Install Terraform on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Install Terraform on FreeBSD 15

Introduction This guide explains how to Install Terraform on FreeBSD 15 on FreeBSD 15. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for fine-grained privilege separation. […]

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Common Problems 115995

UFW Blocking SSH or Required Service Ports

🟡 Medium   ⏱ 5–30 min  Last verified: 4 July 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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Common Problems 116093

MicroK8s Not Starting on Ubuntu 26.04 LTS

🟠 High   ⏱ 5–30 min  Last verified: 4 July 2026 Affected versions: 26.04 📖 ~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 […]

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How to Set Up a Private Docker Registry on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Set Up a Private Docker Registry on FreeBSD 15

Introduction Deploying set up a private docker registry on a FreeBSD 15 machine differs from Linux in several important ways: packages come from the FreeBSD Ports Collection or the binary pkg repository, services are registered in /etc/rc.conf via sysrc(8), and firewall rules are written in pf.conf(5) syntax. This tutorial stays entirely within the standard base […]

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Common Problems 115966

Ubuntu 26.04 LTS – Snap applications fail to start after core refresh – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 4 July 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 Set Up HTTPS Redirect in Nginx on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Set Up HTTPS Redirect in Nginx on FreeBSD 15

Introduction How to Set Up HTTPS Redirect in Nginx on FreeBSD 15 is a core administration task for any FreeBSD 15 server operator. FreeBSD 15 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf […]

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openSUSE Leap 15.6 — coredns — multiple vulnerabilities (9 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — coredns — multiple vulnerabilities (9 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2026:1042-1 (see also SUSE bugzilla) Related CVEs: CVE-2026-26017 CVE-2026-26018 CVE-2025-68156 CVE-2022-27191 CVE-2023-28452 CVE-2023-30464 CVE-2025-58063 CVE-2022-28948  +1 more Upstream summary: CoreDNS is a DNS server that chains plugins. Prior to version 1.14.2, […]

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How to Install and Configure Varnish Cache on FreeBSD 15 — step-by-step FreeBSD 15 tutorial on Progressive Robot

How to Install and Configure Varnish Cache on FreeBSD 15

Introduction This guide explains how to Install and Configure Varnish Cache on FreeBSD 15 on FreeBSD 15. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum for […]

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Common Problems 113916

RHEL 10 RPM Database Corruption Blocks Package Operations

🔴 Critical   ⏱ 5–30 min  Last verified: 3 July 2026 Affected versions: RHEL 10.0 RHEL 10.1 📖 ~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 […]

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