DNS

Ubuntu 18.04 — libmicrodns — multiple vulnerabilities (7 CVEs) — patch and remediation guide — diagnosis and fix on Ubuntu 18.04

Ubuntu 18.04 — libmicrodns — multiple vulnerabilities (7 CVEs) — patch and remediation guide

🟡 Medium   ⏱ 10–30 min  Last verified: 13 June 2021 Affected versions: Ubuntu 18.04 (bionic) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-7239-1 Related CVEs: CVE-2020-6071 CVE-2020-6072 CVE-2020-6073 CVE-2020-6077 CVE-2020-6078 CVE-2020-6079 CVE-2020-6080 Upstream summary: It was discovered that libmicrodns could recursively follow the same compression pointer, leading to an infinite loop. An […]

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Common Problems 112911

Windows Server 2016 — Pending Reboot State Persists and Prevents New Updates — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 12 June 2021 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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Common Problems 112554

Windows Server 2019 — FSMO seizure recovery required after permanent loss of role holder — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 12 June 2021 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 Configure DNS Server on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Configure DNS Server on Windows Server 2019

How to Configure DNS Server on Windows Server 2019 Domain Name System (DNS) is the backbone of both internet connectivity and Active Directory. Windows Server 2019 includes a full-featured DNS server role that supports forward and reverse lookup zones, dynamic DNS updates, DNS Security Extensions (DNSSEC), DNS policies, Response Rate Limiting (RRL), and DNS over […]

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Common Problems 117571

Ubuntu 20.04 LTS – Docker daemon fails after kernel update with cgroup issues – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 10 June 2021 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 Set Up iSCSI Target Server on Windows Server 2019 — step-by-step Windows Server 2019 tutorial on Progressive Robot

How to Set Up iSCSI Target Server on Windows Server 2019

Introduction to iSCSI Target Server on Windows Server 2019 The iSCSI Target Server role in Windows Server 2019 allows you to present disk storage over a standard TCP/IP network to iSCSI initiators on other servers or workstations. This eliminates the need for dedicated Fibre Channel infrastructure, making shared block storage accessible over your existing Ethernet […]

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Common Problems 115033

RHEL 8 sudo command delay caused by SSSD offline lookups

🟡 Medium   ⏱ 5–30 min  Last verified: 10 June 2021 📖 ~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 112531

Windows Server 2019 – Hyper-V virtual switch loses uplink after NIC driver update – Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 June 2021 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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Common Problems 112403

Windows Server 2019 — Conditional forwarders timing out across site-to-site VPN links on Windows Server 2019 DNS — Fix & Prevention

🟠 High   ⏱ 5–30 min  Last verified: 9 June 2021 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 Use Python Virtual Environments on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Use Python Virtual Environments on RHEL 8

Python virtual environments solve the problem of conflicting package versions across projects by giving each application its own isolated Python installation and package tree. On RHEL 8, the venv module is included with every Python 3 installation, so no additional packages are required to get started. This tutorial covers creating and activating virtual environments, managing […]

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