Linux

Common Problems 127049

CentOS Stream 10 – Common Problem 234 – Diagnosis and Fix

🔴 Critical   ⏱ 5–30 min  Last verified: 26 December 2024 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 […]

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How to Install Prometheus and Grafana on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Install Prometheus and Grafana on CentOS Stream 10

Introduction How to Install Prometheus and Grafana on CentOS Stream 10 on CentOS Stream 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 […]

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Common Problems 119953

Debian 12 – apt update fails because repository Release file is expired

🟠 High   ⏱ 5–30 min  Last verified: 26 December 2024 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 116550

Ubuntu 24.04 LTS – boot drops to initramfs BusyBox shell – Fix & Prevention (FIX-PREVENTION-2)

🟠 High   ⏱ 5–30 min  Last verified: 26 December 2024 Affected versions: Ubuntu 24.04 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 Tune System Performance with tuned on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Tune System Performance with tuned on CentOS Stream 10

Introduction How to Tune System Performance with tuned on CentOS Stream 10 on CentOS Stream 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 […]

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Common Problems 116439

Ubuntu 24.04 LTS UFW Blocks Docker Published Ports

🟡 Medium   ⏱ 5–30 min  Last verified: 26 December 2024 📖 ~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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Ubuntu 22.04 — libsndfile — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 22.04

Ubuntu 22.04 — libsndfile — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 26 December 2024 Affected versions: Ubuntu 22.04 (jammy) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7273-1 Related CVEs: CVE-2021-4156 CVE-2024-50612 CVE-2022-33065 Upstream summary: It was discovered that libsndfile incorrectly handled memory when executing its FLAC codec. If a user or automated system were tricked into […]

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openSUSE Tumbleweed — perl-Module-ScanDeps — vulnerability — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — perl-Module-ScanDeps — vulnerability — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2025:14635-1 (see also SUSE bugzilla) Related CVEs: CVE-2024-10224 Upstream summary: Qualys discovered that if unsanitized input was used with the library Modules::ScanDeps, before version 1.36 a local attacker could possibly execute arbitrary […]

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SLES 15 — gnome-shell — multiple vulnerabilities (6 CVEs) — patch and remediation guide — diagnosis and fix on SLES 15

SLES 15 — gnome-shell — multiple vulnerabilities (6 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 26 December 2024 Affected versions: SLES 15 📖 ~4 min read  •  Source: SUSE advisory RHSA-2024:9114 (see also SUSE bugzilla) Related CVEs: CVE-2024-36472 CVE-2023-43090 CVE-2010-4000 CVE-2017-8288 CVE-2019-3820 CVE-2020-17489 Upstream summary: In GNOME Shell through 45.7, a portal helper can be launched automatically (without user confirmation) based on […]

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How to Configure a Static IP Address with Netplan on Ubuntu 24.04 — step-by-step Linux tutorial on Progressive Robot

How to Install and Configure Dovecot IMAP Server on Ubuntu 24.04

Dovecot is a secure, open-source IMAP and POP3 server that works alongside Postfix to deliver email to mail clients. This guide installs and configures Dovecot IMAP on Ubuntu 24.04 LTS. Tested and valid on: Ubuntu 24.04 LTS Prerequisites Ubuntu 24.04 LTS server Postfix installed and configured A domain name with MX records A user with […]

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