Kernel Drivers

Common Problems 118102

Ubuntu 18.04 LTS user cannot log in after home directory permission drift

🟡 Medium   ⏱ 5–30 min  Last verified: 4 December 2019 📖 ~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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How to Install Symfony on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Install Symfony on FreeBSD 12

Introduction How to Install Symfony 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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FreeBSD 12 — FreeBSD-kernel — multiple vulnerabilities (20 CVEs) — patch and remediation guide — diagnosis and fix on FreeBSD 12

FreeBSD 12 — FreeBSD-kernel — multiple vulnerabilities (20 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 4 December 2019 Affected versions: FreeBSD 12 📖 ~4 min read  •  Source: FreeBSD VuXML VuXML topic: FreeBSD — Missing validation in ptrace(PT_SC_REMOTE) Related CVEs: CVE-2004-0230 CVE-2013-3077 CVE-2013-4851 CVE-2013-5209 CVE-2014-1453 CVE-2014-3000 CVE-2014-3711 CVE-2014-3873  +12 more Upstream summary: Problem Description: ptrace(PT_SC_REMOTE) failed to properly validate parameters for the […]

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Common Problems 115499

RHEL 7 LVM thin pool full leading to write failures

🟠 High   ⏱ 5–30 min  Last verified: 3 December 2019 Affected versions: RHEL 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 & Hardening Related Errors & […]

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How to Configure Remote Desktop Web Access on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure Remote Desktop Web Access on Windows Server 2019

How to Configure Remote Desktop Web Access on Windows Server 2019 Remote Desktop Web Access (RD Web Access) provides a web portal through which users can access RemoteApp programs and session desktops without installing any software other than a web browser or the Remote Desktop client. Users navigate to an HTTPS URL, authenticate with their […]

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How to Set Up a PXE Boot Server on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up a PXE Boot Server on RHEL 7

How to Set Up a PXE Boot Server on RHEL 7 Provisioning bare-metal servers or virtual machines one by one from USB media does not scale. A PXE (Preboot Execution Environment) boot server lets a machine boot directly from the network, pull a kernel and RAM disk from a TFTP server, and optionally complete an […]

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How to Run Windows Diagnostics on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Run Windows Diagnostics on Windows Server 2016

How to Configure Windows Diagnostics and Memory Dump on Windows Server 2016 When a Windows Server 2016 system experiences a kernel-mode crash, also known as a Blue Screen of Death or Bug Check, the operating system can be configured to capture diagnostic information in the form of a memory dump file. Analyzing this dump file […]

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How to Install and Configure OpenLiteSpeed Web Server on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install and Configure OpenLiteSpeed Web Server on RHEL 7

How to Install and Configure OpenLiteSpeed Web Server on RHEL 7 OpenLiteSpeed is the open-source edition of LiteSpeed Web Server, one of the fastest web servers available for Linux. It is event-driven, capable of handling tens of thousands of concurrent connections with minimal memory, and includes native support for PHP via LSAPI — an interface […]

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How to Encrypt Disk Partitions with LUKS on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Encrypt Disk Partitions with LUKS on RHEL 8

Linux Unified Key Setup (LUKS) is the standard disk encryption layer on RHEL 8, built on the dm-crypt kernel module and managed through the cryptsetup utility. Encrypting partitions with LUKS ensures that data is unreadable without the correct passphrase or key file, even if physical media is stolen or a drive is decommissioned without secure […]

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Common Problems 112464

Windows Server 2019 — Mandatory profile does not enforce settings for users after logon — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 1 December 2019 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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