DNS

How to Install and Configure k3s Lightweight Kubernetes on Debian 10

• March 1, 2020
• Linux
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Introduction Deploying install and configure k3s lightweight kubernetes 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 […]

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Windows Server 2016 CSV Redirected I/O Mode Reducing Cluster Throughput – Fix & Prevention

• March 1, 2020
• Tutorials
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🟠 High   ⏱ 5–30 min  Last verified: 1 March 2020 Affected versions: Windows Server 2016 📖 ~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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UFW Blocks SSH Access After Rule Changes on Ubuntu 14.04

• February 29, 2020
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 29 February 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 16.04 Swap Not Activating After Reboot

• February 29, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 29 February 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 Docker Multi-Stage Builds on Debian 9

• February 29, 2020
• Linux
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Introduction This guide explains how to Set Up Docker Multi-Stage Builds on Debian 9 on Debian 9 Stretch. Debian Stretch 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 9 install with […]

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systemctl Fails to Start Custom Unit Due to Bad Directive

• February 29, 2020
• Tutorials
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🟡 Medium   ⏱ 5–30 min  Last verified: 29 February 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 Unbound DNS Resolver on Debian 10

• February 29, 2020
• Linux
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Introduction Deploying set up unbound dns resolver 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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RHEL 8 – chronyd Unsynchronized Time Causes Authentication Failures

• February 29, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 29 February 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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Debian 10 – kernel or grub updates fail because /boot is full

• February 28, 2020
• Linux
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🟠 High   ⏱ 5–30 min  Last verified: 28 February 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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Ubuntu 16.04 SSH Login Fails After sshd_config Change

• February 28, 2020
• Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 28 February 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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