Tls Ssl

Common Problems 119099

Ubuntu 14.04 LTS SSL Certificate Verification Fails with Old CA Store

🟡 Medium   ⏱ 5–30 min  Last verified: 22 August 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 112897

Windows Server 2016 — winget install fails with package signature verification error — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 22 August 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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How to Configure StrongSwan IPsec on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure StrongSwan IPsec on Debian 10

Introduction Deploying configure strongswan ipsec 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 need […]

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Common Problems 117601

Ubuntu 20.04 LTS – Nginx fails to start due to configuration syntax errors – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 20 August 2020 Affected versions: Ubuntu 20.04 LTS 📖 ~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 Edge Transport Server for Email on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Configure Edge Transport Server for Email on Windows Server 2016

Introduction Windows Server 2016 includes an optional Edge Transport server role as part of the Exchange Server infrastructure. An Edge Transport server sits in the perimeter network (DMZ), handling all inbound and outbound Internet email to shield internal Exchange servers from direct Internet exposure. It performs anti-spam filtering, recipient validation, connection filtering, and policy enforcement […]

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How to Set Up SonarQube Code Analysis on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set Up SonarQube Code Analysis on Debian 10

Introduction Deploying set up sonarqube code analysis 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 […]

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How to Install and Use Deno on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install and Use Deno on Debian 10

Introduction Deploying install and use deno 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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How to Install and Use tmux on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install and Use tmux on Debian 10

Introduction How to Install and Use tmux 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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How to Configure AppArmor Profiles on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Configure AppArmor Profiles on Debian 10

Introduction How to Configure AppArmor Profiles 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. This […]

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Common Problems 115026

RHEL 8 Cockpit Web Console Unreachable On Port 9090

🟡 Medium   ⏱ 5–30 min  Last verified: 16 August 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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