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Oracle Linux 8 — dotnet security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dotnet security and bugfix update (ELSA-2021-0788)

🟠 High   ⏱ 15–60 min  Last verified: 6 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-0788 Related CVEs: CVE-2021-26701 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 117943

Ubuntu 18.04 LTS high CPU from runaway systemd service

🟡 Medium   ⏱ 5–30 min  Last verified: 6 January 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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Common Problems 115615

RHEL 7 NFS Access Denied By firewalld Missing Ports

🟠 High   ⏱ 5–30 min  Last verified: 6 January 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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Common Problems 114990

XFS filesystem unexpectedly mounted read-only

🟡 Medium   ⏱ 5–30 min  Last verified: 6 January 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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How to Set Up Datadog Agent on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Datadog Agent on Oracle Linux 8

Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying set up datadog agent on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Set Up Datadog Agent on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules […]

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Debian 10 — libxmlrpc3-java — vulnerability — patch and remediation guide — diagnosis and fix on Debian 10

Debian 10 — libxmlrpc3-java — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 January 2021 Affected versions: Debian 10 (buster) 📖 ~4 min read  •  Source: Debian Security Tracker Related CVEs: CVE-2019-17570 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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Ubuntu 18.04 — libhibernate3-java — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libhibernate3-java — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 6 January 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-6845-1 Related CVEs: CVE-2020-25638 Upstream summary: It was discovered that Hibernate incorrectly handled certain inputs with unsanitized literals. If a user or an automated system were tricked into opening a […]

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How To Set Up Ansible Inventories — step-by-step Devops tutorial on Progressive Robot

How To Set Up Ansible Inventories

In this guide, we’ll demonstrate how to create Ansible inventory files and organize servers into groups and subgroups, how to set up host variables, and how to use patterns to control the execution of Ansible commands and playbooks per host and per group.

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