DNS

How to Set the Hostname and FQDN on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Set the Hostname and FQDN on Debian 10

Introduction Deploying set the hostname and fqdn 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 Ensure […]

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openSUSE Tumbleweed — ldns — multiple vulnerabilities (4 CVEs) — patch and remediation guide — diagnosis and fix on openSUSE Tumbleweed

openSUSE Tumbleweed — ldns — multiple vulnerabilities (4 CVEs) — patch and remediation guide

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: openSUSE Tumbleweed 📖 ~4 min read  •  Source: SUSE advisory openSUSE-SU-2020:0438-1 (see also SUSE bugzilla) Related CVEs: CVE-2017-1000231 CVE-2020-19860 CVE-2020-19861 CVE-2011-3581 Upstream summary: A double-free vulnerability in parse.c in ldns 1.7.0 have unspecified impact and attack vectors. Table of contents Symptom & […]

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Common Problems 121110

Debian 10 – Conflicting Time Services Cause Unstable Sync – Single Authority Model

🟡 Medium   ⏱ 5–30 min  Last verified: 16 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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How to Tune Kernel Parameters with sysctl on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Tune Kernel Parameters with sysctl on Debian 10

Introduction Deploying tune kernel parameters with sysctl 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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Common Problems 112947

Windows Server 2016 — DISM RestoreHealth fails because component store is corrupt and unrepairable — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 16 February 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 Set Up Docker on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up Docker on Windows Server 2019

Introduction to Docker on Windows Server 2019 Docker is the leading container platform that provides tools for building, running, and managing containers. On Windows Server 2019, Docker provides native Windows container support alongside the ability to run Linux containers through Hyper-V isolation. Docker on Windows Server 2019 supports Docker Compose for defining and running multi-container […]

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Common Problems 119080

Ubuntu 14.04 LTS UFW Rules Lost After Interface Renaming

🟠 High   ⏱ 5–30 min  Last verified: 15 February 2020 Affected versions: 14.04 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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Common Problems 118403

Ubuntu 16.04 LTS – unattended-upgrades causes sustained CPU usage – Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 15 February 2020 Affected versions: Ubuntu 16.04 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 Install and Configure ISC DHCP Server on Debian 10 — step-by-step Debian 10 tutorial on Progressive Robot

How to Install and Configure ISC DHCP Server on Debian 10

Introduction Deploying install and configure isc dhcp server 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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How to Install Portainer for Docker Management on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Install Portainer for Docker Management on RHEL 7

How to Install Portainer for Docker Management on RHEL 7 Portainer is an open-source container management UI that puts a graphical interface in front of Docker, Swarm, and Kubernetes. Instead of memorising dozens of docker subcommands, Portainer lets you inspect containers, manage images and volumes, view real-time logs, open an in-browser terminal, and deploy stacks […]

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