Troubleshooting

How to Set Up Windows Hello for Business on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Set Up Windows Hello for Business on Windows Server 2016

How to Configure Windows Server 2016 Windows Hello for Business Windows Hello for Business (WHfB) is Microsoft’s enterprise-grade implementation of FIDO2-compatible strong authentication, replacing traditional passwords with cryptographic credentials protected by hardware (TPM) and user gestures such as PIN, fingerprint, or facial recognition. Windows Server 2016 provides the infrastructure components necessary to deploy WHfB for […]

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Oracle Linux 8 — dotnet3.1 security and bugfix update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — dotnet3.1 security and bugfix update (ELSA-2021-2037)

  • October 20, 2020
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 20 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2021-2037 Related CVEs: CVE-2021-31204 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification & Acceptance […]

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Common Problems 118563

Ubuntu 16.04 LTS – service fails due to missing systemd unit dependency – Fix & Prevention

  • October 20, 2020
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 20 October 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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Common Problems 118390

Ubuntu 16.04 LTS Stuck at GRUB Prompt After Kernel Cleanup

  • October 20, 2020
  • Linux
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🟠 High   ⏱ 5–30 min  Last verified: 20 October 2020 Affected versions: 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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Common Problems 117572

Ubuntu 20.04 LTS Cron Jobs Not Running Under systemd Timers

  • October 20, 2020
  • Linux
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🟡 Medium   ⏱ 5–30 min  Last verified: 20 October 2020 Affected versions: 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 Puppet Agent on Oracle Linux 8 — step-by-step Oracle Linux 8 tutorial on Progressive Robot

How to Set Up Puppet Agent on Oracle Linux 8

Introduction Setting up set up puppet agent on oracle linux 8 on a Oracle Linux 8 server is a common task for system administrators, DevOps engineers, and site reliability engineers. This guide explains how to Set Up Puppet Agent on Oracle Linux 8, with all the commands you need, the SELinux and firewalld considerations to […]

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Ubuntu 20.04 — wavpack — vulnerability — patch and remediation guide — diagnosis and fix on Ubuntu 20.04

Ubuntu 20.04 — wavpack — vulnerability — patch and remediation guide

  • October 20, 2020
  • Linux
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🟢 Low   ⏱ 5–15 min  Last verified: 20 October 2020 Affected versions: Ubuntu 20.04 (focal) 📖 ~4 min read  •  Source: Ubuntu Security Notice USN-4682-1 Related CVEs: CVE-2020-35738 Upstream summary: It was discovered that WavPack incorrectly handled certain WAV files. An attacker could possibly use this issue to execute arbitrary code or cause a […]

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How to Use Docker Secrets on FreeBSD 12 — step-by-step FreeBSD 12 tutorial on Progressive Robot

How to Use Docker Secrets on FreeBSD 12

  • October 20, 2020
  • FreeBSD
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Introduction How to Use Docker Secrets on FreeBSD 12 is a core administration task for any FreeBSD 12 server operator. FreeBSD 12 ships with the 15.0-RELEASE kernel, ZFS as the default root filesystem, Capsicum capability sandboxing improvements, and an updated ports tree. Unlike Linux distributions, FreeBSD uses rc(8) for service management, pf for packet filtering, […]

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Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — thunderbird — vulnerability — patch and remediation guide (ELSA-2020-4155)

  • October 20, 2020
  • Linux
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🟠 High   ⏱ 15–60 min  Last verified: 20 October 2020 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2020-4155 Related CVEs: CVE-2020-15677 CVE-2020-15673 CVE-2020-15676 CVE-2020-15678 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches […]

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