Kernel Drivers

How to Configure Performance Counter Alerts on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Performance Counter Alerts on Windows Server 2012 R2

How to Configure MMC Snap-ins on Windows Server 2012 R2 Microsoft Management Console (MMC) is the host application for virtually all Windows Server 2012 R2 administrative tools. Individual management capabilities are delivered as MMC snap-ins — Active Directory Users and Computers, DNS Manager, DHCP Manager, Group Policy Management, Certificate Manager, Computer Management, and dozens of […]

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How to Use AIX Enterprise Identity Mapping (EIM) on IBM AIX 7.1 — step-by-step IBM AIX 7.1 tutorial on Progressive Robot

How to Use AIX Enterprise Identity Mapping (EIM) on IBM AIX 7.1

Introduction IBM AIX 7.1 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 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use aix enterprise identity mapping (eim) on ibm aix […]

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

How to Install Zabbix on FreeBSD 12

Introduction How to Install Zabbix 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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Amazon Linux 2 — kernel-livepatch-4.14.181-142.260 — multiple vulnerabilities (5 CVEs) — patch and remediation guide — diagnosis and fix on Amazon Linux 2

Amazon Linux 2 — kernel-livepatch-4.14.181-142.260 — multiple vulnerabilities (5 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Amazon Linux 2 📖 ~4 min read  •  Source: Amazon Linux advisory ALAS2LIVEPATCH-2020-025 Related CVEs: CVE-2020-10766 CVE-2020-10767 CVE-2020-10768 CVE-2020-12655 CVE-2020-14386 Upstream summary: An issue has been reported in the Linux kernel's handling of raw sockets. This issue can be used locally to […]

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How to Use Makefile for Build Automation on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Use Makefile for Build Automation on FreeBSD 13

Introduction How to Use Makefile for Build Automation 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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How to Create and Manage Group Policy Objects on Windows Server 2012 R2 — step-by-step Windows Server 2012 R2 tutorial on Progressive Robot

How to Create and Manage Group Policy Objects on Windows Server 2012 R2

How to Create and Manage Group Policy Objects on Windows Server 2012 R2 Group Policy is one of the most powerful administrative tools in a Windows Server environment. Group Policy Objects (GPOs) allow administrators to enforce security settings, software installation, desktop configuration, and hundreds of other settings across users and computers in an Active Directory […]

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How to Set Up a Print Server on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Set Up a Print Server on Windows Server 2016

How to Set Up Windows Server 2016 Print Server A Print Server centralizes printer management by hosting printer drivers and queues, making shared printers available to users on the network without requiring each client to install drivers manually. Windows Server 2016 includes the Print and Document Services role for this purpose. This guide covers installing […]

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How to Configure Swap Space on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Configure Swap Space on FreeBSD 13

Introduction How to Configure Swap Space 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 packet filtering, […]

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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-2021-9621)

🟠 High   ⏱ 15–60 min  Last verified: 24 June 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-9621 Related CVEs: CVE-2021-41864 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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How to Harden the FreeBSD Kernel with sysctl on FreeBSD 13 — step-by-step FreeBSD 13 tutorial on Progressive Robot

How to Harden the FreeBSD Kernel with sysctl on FreeBSD 13

Introduction FreeBSD 13 is a UNIX-derived operating system renowned for its network stack performance, ZFS integration, and Jail isolation primitives. Setting up harden the freebsd kernel with sysctl on freebsd 13 on FreeBSD 13 follows the rc.conf/service(8) paradigm rather than systemd, which means enabling a service and configuring its startup options are done differently from […]

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