Kernel Drivers

How to Tune Kernel Parameters with sysctl on SLES 15 — step-by-step SUSE Linux Enterprise 15 tutorial on Progressive Robot

How to Tune Kernel Parameters with sysctl on SLES 15

Introduction This tutorial covers How to Tune Kernel Parameters with sysctl on SLES 15 on SLES 15. SLES 15 (SUSE Linux Enterprise Server 16) is SUSE’s enterprise-grade Linux distribution. It uses the zypper package manager, AppArmor for mandatory access control, and systemctl for service management. Prerequisites Ensure your SLES 15 system is up to date: […]

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How to Configure System Center Data Protection Manager Agent on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure System Center Data Protection Manager Agent on Windows Server 2012 R2

How to Configure System Center Data Protection Manager Agent on Windows Server 2012 R2 System Center Data Protection Manager (DPM) is Microsoft’s enterprise backup and recovery solution that provides continuous data protection for Windows servers, Hyper-V VMs, SQL Server, Exchange, SharePoint, and file servers. The DPM protection agent installed on each protected server enables near-real-time […]

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Common Problems 118048

Ubuntu 18.04 LTS – DKMS module build fails after kernel upgrade – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 13 November 2020 Affected versions: Ubuntu 18.04 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 Configure Network Interfaces with nmcli on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Network Interfaces with nmcli on Oracle Linux 8

Introduction How to Configure Network Interfaces with nmcli on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting […]

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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-2020-5884)

🟠 High   ⏱ 15–60 min  Last verified: 13 November 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-5884 Related CVEs: CVE-2020-25284 CVE-2020-14314 CVE-2020-14385 CVE-2020-14386 CVE-2020-14356 CVE-2020-25212 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

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How to Configure Advanced Audit Policies on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Advanced Audit Policies on Windows Server 2012 R2

How to Configure Advanced Audit Policies on Windows Server 2012 R2 Windows Server 2012 R2 provides a granular audit policy framework through Advanced Audit Policy Configuration that goes far beyond the nine basic categories available in the legacy audit settings. With advanced auditing, you can control exactly which events are logged for each of 58 […]

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Common Problems 118951

Ubuntu 14.04 LTS drops to grub rescue prompt on boot

🔴 Critical   ⏱ 5–30 min  Last verified: 12 November 2020 Affected versions: 14.04 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 a Certificate Authority on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up a Certificate Authority on Oracle Linux 8

Introduction How to Set Up a Certificate Authority on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting […]

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Common Problems 118086

Ubuntu 18.04 LTS – kubelet fails to start due to cgroup driver mismatch – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 11 November 2020 Affected versions: Ubuntu 18.04 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 Configure Software RAID on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Configure Software RAID on Oracle Linux 8

Introduction How to Configure Software RAID on Oracle Linux 8 on Oracle Linux 8 provides administrators with a robust, enterprise-ready workflow that integrates cleanly with systemd, SELinux, firewalld, and the modern AppStream module system. In this tutorial we will walk through every step required, from package installation to verification, so that the resulting configuration is […]

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