Kernel Drivers

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

Oracle Linux 8 — kernel — vulnerability — patch and remediation guide (ELSA-2024-5101)

🟠 High   ⏱ 15–60 min  Last verified: 1 January 2022 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2024-5101 Related CVEs: CVE-2021-46939 CVE-2021-47018 CVE-2021-47257 CVE-2021-47284 CVE-2021-47304 CVE-2021-47373 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]

Read more
How to Secure Nginx with Let's Encrypt on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Secure Nginx with Let’s Encrypt on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying secure nginx with let’s encrypt on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Secure Nginx with Let’s Encrypt on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the […]

Read more
Common Problems 112972

Windows Server 2016 — DHCP NACK storms after VLAN resegmentation create widespread endpoint disconnects — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 31 December 2021 Affected versions: Windows Server 2016 📖 ~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 […]

Read more
How to Set Up a Ceph Storage Cluster on RHEL 7 — step-by-step RHEL 7 tutorial on Progressive Robot

How to Set Up a Ceph Storage Cluster on RHEL 7

How to Set Up a Ceph Storage Cluster on RHEL 7 Ceph is an open-source, software-defined storage platform that provides object, block, and filesystem storage in a single unified cluster. Unlike traditional SANs or NAS appliances, Ceph distributes data and metadata across commodity hardware using the CRUSH algorithm, eliminating single points of failure and scaling […]

Read more
How to Install ClamAV Antivirus on RHEL 8 — step-by-step RHEL 8 tutorial on Progressive Robot

How to Install ClamAV Antivirus on RHEL 8

ClamAV is an open-source antivirus engine widely used on Linux servers to scan for malware in email attachments, uploaded files, and shared storage directories. Although Linux malware is less common than its Windows counterpart, RHEL 8 servers often act as intermediaries that receive and redistribute files to mixed-OS environments, making antivirus scanning an important layer […]

Read more
Common Problems 113535

Windows Server 2012 R2 — Asymmetric routing through multi-homed NICs triggers firewall state drops — Fix & Prevention

🟡 Medium   ⏱ 5–30 min  Last verified: 28 December 2021 Affected versions: Windows Server 2012 R2 📖 ~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 […]

Read more
How to Install and Use Docker on Windows Server 2016 — step-by-step Windows Server 2016 tutorial on Progressive Robot

How to Install and Use Docker on Windows Server 2016

How to Set Up Windows Server 2016 Docker Docker on Windows Server 2016 gives administrators and developers a production-grade container runtime directly on a Windows host without needing a Linux VM intermediary. Windows Server 2016 was the first Windows release to support Docker Engine natively, and Microsoft ships an official DockerMsftProvider PowerShell module that simplifies […]

Read more
How to Use Skopeo for Container Images on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Use Skopeo for Container Images on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying use skopeo for container images on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Use Skopeo for Container Images on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the […]

Read more
How to Configure ArgoCD on CentOS Stream 9 — step-by-step CentOS Stream 9 tutorial on Progressive Robot

How to Configure ArgoCD on CentOS Stream 9

Introduction CentOS Stream 9 ships with a stable, security-hardened base that makes deploying configure argocd on centos stream 9 both straightforward and auditable. This tutorial covers the complete procedure for how to Configure ArgoCD on CentOS Stream 9, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for network-facing services. […]

Read more
Oracle Linux 8 — kernel — security and stability fixes — required update — diagnosis and fix on Oracle Linux 8

Oracle Linux 8 — kernel — security and stability fixes — required update (ELSA-2023-0832)

🟠 High   ⏱ 15–60 min  Last verified: 26 December 2021 Affected versions: Oracle Linux 8 📖 ~4 min read  •  Source: ELSA advisory ELSA-2023-0832 Related CVEs: CVE-2022-2873 CVE-2022-41222 CVE-2022-43945 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – Alternative Approaches Verification […]

Read more
CHAT