April 2021

Oracle Linux 8 — grafana security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — grafana security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2021-4226)

  • April 30, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 30 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-4226 Related CVEs: CVE-2021-33195 CVE-2021-34558 CVE-2021-27358 CVE-2021-3114 CVE-2021-33197 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative […]

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Common Problems 118094

Ubuntu 18.04 VPN connection fails to establish

  • April 30, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 30 April 2021 📖 ~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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AlmaLinux 8 — python-lit — vulnerability — patch and remediation guide — diagnosis and fix on AlmaLinux 8

AlmaLinux 8 — python-lit — vulnerability — patch and remediation guide

  • April 30, 2021
  • Linux
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🟡 Medium   ⏱ 10–30 min  Last verified: 25 May 2026 Affected versions: AlmaLinux 8 📖 ~4 min read  •  Source: AlmaLinux ALSA ALSA-2021:4743 Related CVEs: CVE-2021-42574 Upstream summary: LLVM Toolset provides the LLVM compiler infrastructure framework, the Clang compiler for the C and C++ languages, the LLDB debugger, and related tools for code analysis. […]

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How to Install CockroachDB on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Install CockroachDB on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying install cockroachdb on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Install CockroachDB on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

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Common Problems 115566

RHEL 7 yum Dependency Conflict with EPEL Packages

  • April 30, 2021
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 30 April 2021 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 & […]

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Oracle Linux 8 — librepo — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — librepo — vulnerability — patch and remediation guide (ELSA-2020-3658)

  • April 30, 2021
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 30 April 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-3658 Related CVEs: CVE-2020-14352 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 115054

TLS Certificate Chain Errors with curl or dnf

🟡 Medium   ⏱ 5–30 min  Last verified: 30 April 2021 📖 ~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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IBM AIX 7.2 — CVE-2021-29747 — vulnerability — patch and remediation guide — diagnosis and fix on IBM AIX 7.2

IBM AIX 7.2 — CVE-2021-29747 — vulnerability — patch and remediation guide

🟠 High   ⏱ 30–90 min  Last verified: 30 April 2021 Affected versions: IBM AIX 7.2 📖 ~4 min read  •  Source: NVD CVE-2021-29747, IBM Support Bulletin CVE: CVE-2021-29747 NVD summary: IBM InfoSphere Information Server 11.7 could allow a remote attacker to obtain highly sensitive information due to a vulnerability in the authentication mechanism. IBM […]

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How to Configure Persistent Volumes in Kubernetes on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Configure Persistent Volumes in Kubernetes on Debian 9

  • April 30, 2021
  • Linux
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Introduction This guide explains how to Configure Persistent Volumes in Kubernetes on Debian 9 on Debian 9 Stretch. Debian Stretch uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 9 install with […]

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