How to Manage System Packages with yum on RHEL 7 Package management is one of the most fundamental skills for a RHEL 7 system administrator. The Yellowdog Updater Modified (yum) is the default package manager on RHEL 7, and it handles everything from installing and removing software to managing repositories, grouping related packages, and maintaining […]
🟡 Medium ⏱ 5–30 min Last verified: 19 October 2020 📖 ~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 […]
🟡 Medium ⏱ 10–30 min Last verified: 19 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2023-0079 Related CVEs: CVE-2023-21538 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]
🟠 High ⏱ 5–30 min Last verified: 19 October 2020 Affected versions: Windows Server 2019 📖 ~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 […]
🔴 Critical ⏱ 15–90 min Last verified: 25 May 2026 Affected versions: Arch Linux (rolling release) 📖 ~4 min read • Source: Arch ASA ASA-202004-10 Related CVEs: CVE-2020-11647 CVE-2018-19628 CVE-2018-19627 CVE-2018-19626 CVE-2018-19625 CVE-2018-19624 CVE-2018-19623 CVE-2018-19622 +12 more Upstream summary: Type: arbitrary code execution. Status: Fixed. Affected: 3.2.2-1. Fixed in: 3.2.3-1. Group: AVG-1129. Table of […]
Introduction This tutorial demonstrates how to Install OpenShift CLI on Oracle Linux 8 on Oracle Linux 8. It is written for administrators who want a repeatable, well-explained walkthrough that goes beyond a bare command list and explains each configuration choice. Every command is tested against a freshly registered Oracle Linux 8 system with the default […]
🟢 Low ⏱ 5–15 min Last verified: 19 October 2020 Affected versions: Ubuntu 16.04 (xenial) 📖 ~4 min read • Source: Ubuntu Security Notice USN-4501-1 Related CVEs: CVE-2020-15890 Upstream summary: It was discovered that an out-of-bounds read existed in LuaJIT. An attacker could use this to cause a denial of service (application crash) or […]
🟡 Medium ⏱ 10–30 min Last verified: 19 October 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read • Source: Ubuntu Security Notice USN-5681-1 Related CVEs: CVE-2018-18718 CVE-2019-20326 CVE-2020-36427 Upstream summary: It was discovered that gThumb did not properly managed memory under certain circumstances. An attacker could possibly use this issue to cause […]
Introduction This guide explains how to Deploy a Flask App with Gunicorn on FreeBSD 12 on FreeBSD 12. FreeBSD uses the pkg(8) binary package manager, rc.conf(5) for service startup configuration, and pf(4) as its primary packet filter. There is no SELinux or AppArmor — instead, FreeBSD provides the MAC (Mandatory Access Control) framework and Capsicum […]
🟡 Medium ⏱ 10–30 min Last verified: 19 October 2020 Affected versions: SLES 15 📖 ~4 min read • Source: SUSE advisory SUSE-SU-2021:1029-1 (see also SUSE bugzilla) Related CVEs: CVE-2020-12658 Upstream summary: gssproxy (aka gss-proxy) before 0.8.3 does not unlock cond_mutex before pthread exit in gp_worker_main() in gp_workers.c. NOTE: An upstream comment states "We […]
