DNS

Common Problems 118428

Could Not Resolve security.ubuntu.com

🟡 Medium   ⏱ 5–30 min  Last verified: 15 January 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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Common Problems 118404

Ubuntu 16.04 LTS boot drops to initramfs after unclean shutdown

🟠 High   ⏱ 5–30 min  Last verified: 15 January 2020 Affected versions: 16.04 16.04.7 📖 ~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 Ceph Storage Cluster on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Ceph Storage Cluster on Debian 10

Introduction How to Configure Ceph Storage Cluster 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 10. […]

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Common Problems 114952

RHEL 8 Podman Image Pull Fails with TLS or Certificate Errors

🟠 High   ⏱ 5–30 min  Last verified: 14 January 2020 Affected versions: 8.6 8.7 8.8 8.9 8.10 📖 ~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 […]

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How to Set Up Suricata IDS/IPS on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up Suricata IDS/IPS on Debian 10

Introduction This guide explains how to Set Up Suricata IDS/IPS 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 the […]

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How to Install Keepalived for High Availability on Debian 9 — step-by-step Debian 9 tutorial on Progressive Robot

How to Install Keepalived for High Availability on Debian 9

Introduction This guide explains how to Install Keepalived for High Availability 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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How to Configure Bonding Network Interfaces on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure Bonding Network Interfaces on Debian 10

Introduction Deploying configure bonding network interfaces 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 You will […]

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Common Problems 112427

Windows Server 2019 – tcpip.sys DPC latency spikes degrade throughput – Fix and Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 12 January 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 Configure Active Directory Federation Services (AD FS 3.0) on Windows Server 2012 R2 — Windows Server 2012 R2 tutorial on Progressive Robot

How to Configure Active Directory Federation Services (AD FS 3.0) on Windows Server 2012 R2

How to Configure Active Directory Federation Services (AD FS 3.0) on Windows Server 2012 R2 Active Directory Federation Services 3.0 (AD FS) on Windows Server 2012 R2 provides Security Token Service (STS) functionality, enabling federated identity and single sign-on (SSO) across organizational boundaries and cloud applications. AD FS issues security tokens to authenticated users, which […]

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