Kernel Drivers

How to Configure Windows Server 2019 Group Policy Security Filtering — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Windows Server 2019 Group Policy Security Filtering

How to Configure Windows Server 2019 Group Policy Security Filtering Group Policy Security Filtering controls which users and computers a GPO applies to within a linked OU, domain, or site. By default, all GPOs apply to the Authenticated Users group, which includes all domain users and computers. Security Filtering lets you scope GPO application to […]

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Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — Unbreakable Enterprise kernel — vulnerability — patch and remediation guide (ELSA-2021-9362)

🟠 High   ⏱ 15–60 min  Last verified: 9 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9362 Related CVEs: CVE-2021-23133 CVE-2020-25671 CVE-2021-33033 CVE-2020-25670 CVE-2021-32399 CVE-2020-25672 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 112633

Windows Server 2019 — Jumbo frame MTU mismatch across virtual and physical switches fragments storage traffic — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 8 August 2021 Affected versions: Windows Server 2019 📖 ~2 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 — kernel — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel — security and stability fixes — required update (ELSA-2024-4211)

🟠 High   ⏱ 15–60 min  Last verified: 7 August 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-4211 Related CVEs: CVE-2023-52877 CVE-2023-52881 CVE-2024-26585 CVE-2024-26675 CVE-2024-26907 CVE-2024-26982 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 118631

Ubuntu 16.04 LTS – kernel module fails due to missing firmware

🟡 Medium   ⏱ 5–30 min  Last verified: 7 August 2021 Affected versions: Ubuntu 16.04 LTS Ubuntu 16.04 Ubuntu 16.04.7 📖 ~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 […]

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How to Install and Configure Squid Proxy on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Install and Configure Squid Proxy on FreeBSD 13

Introduction How to Install and Configure Squid Proxy on FreeBSD 13 is a core administration task for any FreeBSD 13 server operator. FreeBSD 13 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for […]

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Common Problems 114903

RHEL 8 AppStream module conflict prevents package install

🟡 Medium   ⏱ 5–30 min  Last verified: 6 August 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 113493

Windows Server 2012 R2 — NIC teaming intermittently drops network connectivity — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 5 August 2021 Affected versions: Windows Server 2012 R2 📖 ~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 […]

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Common Problems 117623

OOM Kills Java Process Under Load

🔴 Critical   ⏱ 5–30 min  Last verified: 4 August 2021 Affected versions: 20.04 📖 ~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 […]

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Common Problems 117586

Ubuntu 20.04 Printer Not Detected

🟡 Medium   ⏱ 5–30 min  Last verified: 4 August 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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