Linux

Oracle Linux 9 — libtasn1 — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 9

Oracle Linux 9 — libtasn1 — vulnerability — patch and remediation guide (ELSA-2023-0343)

🟡 Medium   ⏱ 10–30 min  Last verified: 15 January 2023 Affected versions: Oracle Linux 9 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-0343 Related CVEs: CVE-2021-46848 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

Read more
Oracle Linux 8 — emacs — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — emacs — vulnerability — patch and remediation guide (ELSA-2023-7083)

🟡 Medium   ⏱ 10–30 min  Last verified: 15 January 2023 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-7083 Related CVEs: CVE-2022-48339 CVE-2022-48337 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & […]

Read more
Red Hat Enterprise Linux 7 — perl — vulnerability — patch and remediation guide — diagnosis and fix on Red Hat Enterprise Linux 7

Red Hat Enterprise Linux 7 — perl — vulnerability — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: Red Hat Enterprise Linux 7 📖 ~4 min read  •  Source: Red Hat advisory RHSA RHSA-2026:0079 Related CVEs: CVE-2023-31484 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

Read more
Common Problems 116889

Ubuntu 22.04 LTS – apt update fails because dpkg lock is held

🟠 High   ⏱ 5–30 min  Last verified: 14 January 2023 Affected versions: Ubuntu 22.04 LTS Ubuntu 22.04 Ubuntu 22.04.4 📖 ~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 […]

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

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

🟢 Low   ⏱ 5–15 min  Last verified: 14 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-3378 CVE-2009-3388 Upstream summary: The oggplay_data_handle_theora_frame function in media/liboggplay/src/liboggplay/oggplay_data.c in liboggplay, as used in Mozilla Firefox 3.5.x before 3.5.4, attempts to reuse an earlier frame data structure upon […]

Read more
Common Problems 115475

RHEL 7 chronyd Not Syncing Time

🟡 Medium   ⏱ 5–30 min  Last verified: 14 January 2023 Affected versions: RHEL 7 📖 ~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 & […]

Read more
Common Problems 114621

RHEL 9 package transactions hang due to lock contention

🟡 Medium   ⏱ 5–30 min  Last verified: 14 January 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 […]

Read more
Debian 11 — libgdiplus — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — libgdiplus — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2010-1526 Upstream summary: Multiple integer overflows in libgdiplus 2.6.7, as used in Mono, allow attackers to execute arbitrary code via (1) a crafted TIFF file, related to the […]

Read more
Debian 11 — merkaartor — vulnerability — patch and remediation guide — diagnosis and fix on Debian 11

Debian 11 — merkaartor — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 14 January 2023 Affected versions: Debian 11 (bullseye) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2009-4193 Upstream summary: Merkaartor 0.14 allows local users to append data to arbitrary files via a symlink attack on the /tmp/merkaartor.log temporary file. Table of contents Symptom & […]

Read more
Utiliser Grep et les expressions régulières pour rechercher des modèles de texte en Linux — step-by-step Linux tutorial on Progressive Robot

Utiliser Grep et les expressions régulières pour rechercher des modèles de texte en Linux

Grep est un outil qui permet de rechercher certains modèles spécifiques dans un texte saisi en utilisant des expressions régulières. Les expressions régulières sont un système qui permet de décrire les modèles de texte complexes. Les expressions régulières représentent un puissant outil qui peut être utilisé dans divers programmes texte différents. Au cours de ce tutoriel, vous allez utiliser grep et des expressions régulières pour effectuer une recherche dans un texte.

Read more
CHAT