Linux

Oracle Linux 8 — frr — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — frr — security and stability fixes — required update (ELSA-2023-2801)

🟡 Medium   ⏱ 10–30 min  Last verified: 17 August 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-2801 Related CVEs: CVE-2022-37032 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Common Problems 121611

Debian 9 – Conflicting Time Services Cause Unstable Sync – Single Authority Model

🟡 Medium   ⏱ 5–30 min  Last verified: 17 August 2022 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 120559

Debian 11 DNS Resolution Intermittently Fails

🟡 Medium   ⏱ 5–30 min  Last verified: 17 August 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 117088

Ubuntu 22.04 LTS – filesystem remounted read-only after I/O errors – Fix & Prevention

🔴 Critical   ⏱ 5–30 min  Last verified: 17 August 2022 Affected versions: Ubuntu 22.04 LTS (Jammy) 📖 ~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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AlmaLinux 8 — scotch — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — scotch — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALBA-2021:1970 Upstream summary: For detailed information on changes in this release, see the AlmaLinux Release Notes linked from the References section. Table of contents Symptom & Impact Environment & Reproduction Root Cause […]

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Debian 11 — libpar-perl — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libpar-perl — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 August 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2011-5060 Upstream summary: The par_mktmpdir function in the PAR module before 1.003 for Perl creates temporary files in a directory with a predictable name without verifying ownership and […]

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Debian 11 — libsamplerate — multiple vulnerabilities (2 CVEs) — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libsamplerate — multiple vulnerabilities (2 CVEs) — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 17 August 2022 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2008-5008 CVE-2017-7697 Upstream summary: Buffer overflow in src/src_sinc.c in Secret Rabbit Code (aka SRC or libsamplerate) before 0.1.4, when "extreme low conversion ratios" are used, allows user-assisted attackers […]

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Amazon Linux 2 — ctags — vulnerability — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — ctags — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2-2023-2343 Related CVEs: CVE-2022-4515 Upstream summary: A flaw was found in Exuberant Ctags in the way it handles the "-o" option. This option specifies the tag filename. A crafted tag […]

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How to Set Up Checksum Monitoring with AIDE on RHEL 9 — step-by-step RHEL 9 tutorial on Progressive Robot

How to Set Up Checksum Monitoring with AIDE on RHEL 9

AIDE (Advanced Intrusion Detection Environment) builds a cryptographic database of file attributes and checksums, then alerts you whenever a monitored file changes unexpectedly — a technique known as file integrity monitoring (FIM). On RHEL 9, AIDE is available in the standard repositories and integrates cleanly with systemd timers for scheduled checks and with auditd for […]

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