DNS

openSUSE Leap 15.5 — python3-dnspython — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.5

openSUSE Leap 15.5 — python3-dnspython — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.5 📖 ~4 min read  •  Source: SUSE advisory RHSA-2024:9423 (see also SUSE bugzilla) Related CVEs: CVE-2023-29483 Upstream summary: eventlet before 0.35.2, as used in dnspython before 2.6.0, allows remote attackers to interfere with DNS name resolution by quickly sending […]

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How to Configure MySQL Replication on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure MySQL Replication on CentOS Stream 9

Introduction Setting up configure mysql replication on centos stream 9 on a CentOS Stream 9 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Configure MySQL Replication on CentOS Stream 9, with all the commands you need, the SELinux and firewalld considerations to keep in […]

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Common Problems 121518

Kernel Panic After Unattended Upgrade

🔴 Critical   ⏱ 5–30 min  Last verified: 4 December 2023 Affected versions: Debian 9 📖 ~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 120041

Debian 12 – sudo Stops Working Due to Broken Permissions – Emergency Repair

🔴 Critical   ⏱ 5–30 min  Last verified: 4 December 2023 Affected versions: Debian 12 📖 ~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 117086

Ubuntu 22.04 Broken Dependencies and Held Packages Block Upgrades

🟡 Medium   ⏱ 5–30 min  Last verified: 4 December 2023 📖 ~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 114391

RHEL 9 dnf metadata errors and failed mirror sync

🟡 Medium   ⏱ 5–30 min  Last verified: 4 December 2023 📖 ~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 Harden PHP on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Harden PHP on FreeBSD 14

Introduction This guide explains how to Harden PHP on FreeBSD 14 on FreeBSD 14. 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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How to Install Go on FreeBSD 14 — step-by-step FreeBSD 14 tutorial on Progressive Robot

How to Install Go on FreeBSD 14

Introduction This guide explains how to Install Go on FreeBSD 14 on FreeBSD 14. 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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How to Install GitLab Runner on Debian 12 — step-by-step Debian 12 tutorial on Progressive Robot

How to Install GitLab Runner on Debian 12

Introduction Debian 12 Bookworm is built around the ethos of stability and free software. Setting up install gitlab runner on debian 12 on Bookworm leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Bookworm freeze. Follow each step carefully and the […]

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Common Problems 114414

DNF Modular Stream Conflicts in RHEL 9

🟡 Medium   ⏱ 5–30 min  Last verified: 4 December 2023 📖 ~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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