DNS

Windows Server 2019 — DNS Server service intermittently stops responding after cumulative update on Windows Server 2019 — Fix & Prevention

• March 13, 2020
• Tutorials
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🟠 High   ⏱ 5–30 min  Last verified: 13 March 2020 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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How to Set Up SSH Key Authentication on Debian 10

• March 13, 2020
• Linux
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Introduction Debian 10 Buster is built around the ethos of stability and free software. Setting up set up ssh key authentication on debian 10 on Buster leverages the same proven Debian packaging system that powers millions of servers worldwide, while benefiting from the latest upstream releases included in the Buster freeze. Follow each step carefully […]

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Debian 10 – high CPU and disk I/O from systemd-journald

• March 12, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 12 March 2020 Affected versions: Debian 10 📖 ~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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Windows Server 2019 – Just-in-Time admin elevation fails through PAM workflows – Fix & Prevention

• March 12, 2020
• Tutorials
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🟠 High   ⏱ 5–30 min  Last verified: 12 March 2020 Affected versions: Windows Server 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 […]

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How to Set Up Snapshots with LVM on Debian 10

• March 12, 2020
• Linux
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Introduction This guide explains how to Set Up Snapshots with LVM on Debian 10 on Debian 10 Buster. Debian Buster uses systemd for service management, nftables as the underlying packet filter (with ufw or iptables front-ends still available), and AppArmor for mandatory access control. Every command is designed for a minimal Debian 10 install with […]

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Ubuntu 16.04 external monitor not detected

• March 11, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 11 March 2020 📖 ~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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Ubuntu 18.04 Broken Dependencies and Held Packages

• March 11, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 11 March 2020 📖 ~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 Set Up rsync Backup Jobs on Debian 10

• March 11, 2020
• Linux
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Introduction How to Set Up rsync Backup Jobs on Debian 10 is a fundamental operation for any administrator maintaining a Debian 10 Buster server. Debian 10 Buster 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 […]

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RHEL 8 SELinux Denying httpd Access to Custom Content Path

• March 10, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 10 March 2020 📖 ~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 Configure Docker with TLS Authentication on Debian 10

• March 10, 2020
• Linux
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Introduction Deploying configure docker with tls authentication on debian 10 on a Debian 10 Buster machine is straightforward thanks to Debian’s policy-compliant packaging. Unlike rpm-based distributions, Debian stores configuration helpers in /etc/default/, uses update-rc.d for older init scripts, and provides dpkg-reconfigure for interactive package configuration. This tutorial stays on the systemd path throughout. Prerequisites Before […]

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