Logging Monitoring

Ubuntu 18.04 — ruby-gon — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — ruby-gon — vulnerability — patch and remediation guide

🟢 Low   ⏱ 5–15 min  Last verified: 21 November 2020 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4560-1 Related CVEs: CVE-2020-25739 Upstream summary: It was discovered that Gon gem did not properly escape certain input. An attacker could use this vulnerability to execute a cross-site scripting (XSS) […]

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Oracle Linux 8 — squid:4 security, bug fix, and — enhancement update — new behaviour and fixes — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — squid:4 security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2020-4743)

🟡 Medium   ⏱ 10–30 min  Last verified: 21 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4743 Related CVEs: CVE-2019-18676 CVE-2019-18679 CVE-2019-12526 CVE-2019-12854 CVE-2019-12523 CVE-2019-18677 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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Common Problems 118978

Ubuntu 14.04 LTS SSH Public Key Login Suddenly Fails

🟡 Medium   ⏱ 5–30 min  Last verified: 21 November 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 […]

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Common Problems 117631

Ubuntu 20.04 LTS Recurring ext4 Journal Errors on Reboot

🟠 High   ⏱ 5–30 min  Last verified: 21 November 2020 Affected versions: 20.04 LTS 📖 ~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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How to Set Up iSCSI Initiator on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up iSCSI Initiator on Oracle Linux 8

Introduction Setting up set up iscsi initiator on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up iSCSI Initiator on Oracle Linux 8, with all the commands you need, the SELinux and firewalld considerations to […]

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How to Configure RACF Integration on IBM AIX 7.2 — step-by-step IBM AIX 7.2 tutorial on Progressive Robot

How to Configure RACF Integration on IBM AIX 7.2

Introduction IBM AIX 7.2 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.2 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to configure racf integration on ibm aix 7.2 on IBM […]

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How to Configure LDAP on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure LDAP on Windows Server 2012 R2

How to Configure LDAP on Windows Server 2012 R2 Lightweight Directory Access Protocol (LDAP) is the standard protocol used to access and manage directory services, including Active Directory Domain Services. Applications, scripts, and third-party systems use LDAP to search for users, authenticate accounts, and read or modify directory objects. Windows Server 2012 R2 supports LDAP […]

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

Oracle Linux 8 — systemd security, bug fix, and — enhancement update — new behaviour and fixes (ELSA-2019-3592)

🟡 Medium   ⏱ 10–30 min  Last verified: 20 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2019-3592 Related CVEs: CVE-2019-15718 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 118413

Ubuntu 16.04 LTS – boot drops to initramfs after unclean shutdown – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 20 November 2020 Affected versions: Ubuntu 16.04 LTS 📖 ~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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