Kernel Drivers

How to Install Lua on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Lua on Debian 9

Introduction How to Install Lua on Debian 9 is a fundamental operation for any administrator maintaining a Debian 9 Stretch server. Debian 9 Stretch ships with the Linux 6.12 kernel, updated toolchains, and a fully refreshed package archive — meaning version numbers, configuration file paths, and some dependency chains differ from Debian 9. This tutorial […]

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How to Configure Hyper-V Virtual Machine Settings on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Hyper-V Virtual Machine Settings on Windows Server 2012 R2

How to Configure Hyper-V Virtual Machine Settings on Windows Server 2012 R2 Hyper-V in Windows Server 2012 R2 provides a robust hypervisor platform capable of running dozens of virtual machines on a single physical host. Understanding how to configure virtual machine settings correctly — from CPU allocation to memory management, network adapters, and storage controllers […]

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How to Tune Linux Kernel Parameters with sysctl on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Tune Linux Kernel Parameters with sysctl on RHEL 7

How to Tune Linux Kernel Parameters with sysctl on RHEL 7 The Linux kernel exposes hundreds of tunable parameters through the sysctl interface, allowing system administrators to adjust network behavior, memory management, file descriptor limits, and security policies without recompiling the kernel or rebooting. On Red Hat Enterprise Linux 7, these parameters are managed through […]

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How to Set Up a FreeBSD Jail for Web Hosting on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Set Up a FreeBSD Jail for Web Hosting on FreeBSD 12 (ON-FREEBSD-12)

Introduction How to Set Up a FreeBSD Jail for Web Hosting on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 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 […]

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How to Set Up Alertmanager with Slack on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Set Up Alertmanager with Slack on FreeBSD 13

Introduction How to Set Up Alertmanager with Slack 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 113466

Windows Server 2012 R2 – Display miniport TDR resets freeze RDP sessions – Fix and Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 16 November 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 112493

Windows Server 2019 — RRAS NAT translation table saturation causes outbound traffic drops during peak usage — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 16 November 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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FreeBSD 13 — qemu — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 13

FreeBSD 13 — qemu — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 15 November 2021 Affected versions: FreeBSD 13 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: qemu — denial of service vulnerability Related CVEs: CVE-2007-1320 CVE-2007-1321 CVE-2007-1322 CVE-2007-1323 CVE-2007-1366 CVE-2007-6227 CVE-2008-0928 CVE-2008-2004  +12 more Upstream summary: Daniel P. Berrange reports: The VNC server websockets decoder will […]

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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-2020-2102)

🟠 High   ⏱ 15–60 min  Last verified: 14 November 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-2102 Related CVEs: CVE-2020-2732 CVE-2020-11884 CVE-2020-10711 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

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How to Install containerd on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install containerd on FreeBSD 12

Introduction How to Install containerd on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 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 packet filtering, and […]

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