Linux

Common Problems 120684

Debian 11: Nginx serves incomplete TLS certificate chain

🟠 High   ⏱ 5–30 min  Last verified: 12 October 2022 Affected versions: Debian 11 📖 ~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 117073

Ubuntu 22.04 LTS – MySQL fails to start because AppArmor blocks data path – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 12 October 2022 Affected versions: Ubuntu 22.04 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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Debian 11 — darktable — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — darktable — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 12 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-1438 CVE-2013-1439 CVE-2013-2126 CVE-2015-3885 CVE-2015-8366 CVE-2015-8367 CVE-2018-25017 Upstream summary: Unspecified vulnerability in dcraw 0.8.x through 0.8.9, as used in libraw, ufraw, shotwell, and other products, allows context-dependent attackers […]

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Common Problems 115438

RHEL 7 journalctl Missing Historical Logs After Rotation

🟡 Medium   ⏱ 5–30 min  Last verified: 12 October 2022 📖 ~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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Alpine Linux edge — jenkins — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on Alpine Linux edge

Alpine Linux edge — jenkins — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Alpine Linux edge / fixed in 2.361.2-r0 📖 ~4 min read  •  Source: Alpine secdb entry — jenkins 2.361.2-r0 Related CVEs: CVE-2022-2048 CVE-2022-22970 CVE-2022-22971 CVE-2022-34174 CVE-2022-34173 CVE-2022-34172 CVE-2022-34171 CVE-2022-34170  +12 more Upstream summary: Alpine community repository for vedge ships jenkins 2.361.2-r0 which […]

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Debian 11 — unzip — multiple vulnerabilities (19 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — unzip — multiple vulnerabilities (19 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 12 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2003-0282 CVE-2005-0602 CVE-2005-2475 CVE-2005-4667 CVE-2008-0888 CVE-2014-8139 CVE-2014-8140 CVE-2014-8141  +11 more Upstream summary: Directory traversal vulnerability in UnZip 5.50 allows attackers to overwrite arbitrary files via invalid characters between […]

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Common Problems 115428

RHEL 7 SELinux Prevents Nginx Access to Custom Content Path

🟡 Medium   ⏱ 5–30 min  Last verified: 12 October 2022 📖 ~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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Debian 11 — mozc — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — mozc — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 12 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2013-4509 Upstream summary: The default configuration of IBUS 1.5.4, and possibly 1.5.2 and earlier, when IBus.InputPurpose.PASSWORD is not set and used with GNOME 3, does not obscure the […]

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Debian 11 — pam-shield — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — pam-shield — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 12 October 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2012-2350 Upstream summary: pam_shield before 0.9.4: Default configuration does not perform protective action Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step […]

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How to Install and Configure Squid Proxy on Debian 11 — step-by-step Debian 11 tutorial on Progressive Robot

How to Install and Configure Squid Proxy on Debian 11

Introduction Deploying install and configure squid proxy on debian 11 on a Debian 11 Bullseye machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Before […]

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