Linux

How to Configure Fail2ban on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Configure Fail2ban on CentOS Stream 10

Introduction CentOS Stream 10 ships with a stable, security-hardened base that makes deploying configure fail2ban on centos stream 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure Fail2ban on CentOS Stream 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Common Problems 120146

Debian 12 MariaDB Fails Startup After ib_logfile Size Mismatch

🔴 Critical   ⏱ 5–30 min  Last verified: 14 January 2025 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 116457

Ubuntu 24.04 LTS – apt update returns 404 from stale mirrors – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 14 January 2025 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 Install OpenShift CLI on CentOS Stream 10 — step-by-step CentOS Stream 10 tutorial on Progressive Robot

How to Install OpenShift CLI on CentOS Stream 10

Introduction CentOS Stream 10 ships with a stable, security-hardened base that makes deploying install openshift cli on centos stream 10 both straightforward and auditable. This tutorial covers the complete procedure for how to Install OpenShift CLI on CentOS Stream 10, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]

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Common Problems 116434

Ubuntu 24.04 LTS – netplan apply breaks network connectivity – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 14 January 2025 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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Amazon Linux 2023 — zziplib — multiple vulnerabilities (3 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2023

Amazon Linux 2023 — zziplib — multiple vulnerabilities (3 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2023 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2023-2025-859 Related CVEs: CVE-2024-39133 CVE-2024-39134 CVE-2020-18442 Upstream summary: Heap Buffer Overflow vulnerability in zziplib v0.13.77 allows attackers to cause a denial of service via the __zzip_parse_root_directory() function at /zzip/zip.c. (CVE-2024-39133) […]

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Alpine Linux 3.20 — gettext — vulnerability — patch and remediation guide — diagnosis and fix on Alpine Linux 3.20

Alpine Linux 3.20 — gettext — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.20 / fixed in 0.20.1-r0 📖 ~4 min read  •  Source: Alpine secdb entry — gettext 0.20.1-r0 Related CVEs: CVE-2018-18751 Upstream summary: Alpine main repository for vv3.20 ships gettext 0.20.1-r0 which addresses CVE-2018-18751. Table of contents Symptom & Impact Environment […]

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Ubuntu 20.04 — org-mode — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — org-mode — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 14 January 2025 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7375-1 Related CVEs: CVE-2023-28617 CVE-2024-30202 CVE-2024-30205 CVE-2024-39331 Upstream summary: It was discovered that Org Mode did not correctly handle filenames containing shell metacharacters. An attacker could possibly use this issue […]

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openSUSE Leap 15.6 — sysstat — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Leap 15.6

openSUSE Leap 15.6 — sysstat — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: openSUSE Leap 15.6 📖 ~4 min read  •  Source: SUSE advisory SUSE-SU-2025:0012-1 (see also SUSE bugzilla) Related CVEs: CVE-2022-39377 CVE-2023-33204 Upstream summary: sysstat is a set of system performance tools for the Linux operating system. On 32 bit systems, in versions 9.1.16 […]

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Alpine Linux 3.19 — sdl2_image — multiple vulnerabilities (8 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux 3.19

Alpine Linux 3.19 — sdl2_image — multiple vulnerabilities (8 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux 3.19 / fixed in 2.0.5-r1 📖 ~4 min read  •  Source: Alpine secdb entry — sdl2_image 2.0.5-r1 Related CVEs: CVE-2019-13616 CVE-2017-12122 CVE-2017-14440 CVE-2017-14441 CVE-2017-14442 CVE-2017-14448 CVE-2017-14449 CVE-2017-14450 Upstream summary: Alpine community repository for vv3.19 ships sdl2_image 2.0.5-r1 which addresses CVE-2019-13616. […]

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