How To Edit the Sudoers File Safely
Edit the sudoers file safely with visudo. Validate syntax, grant least-privilege with fragments, recover from errors, and harden Linux.
How to Configure Network Controller with SDN on Windows Server 2016
How to Set Up Windows Server 2016 Network Controller Network Controller is a software-defined networking (SDN) management component introduced in Windows Server 2016 Datacenter edition. It provides a centralized, programmable point of automation for configuring, monitoring, and troubleshooting virtual and physical network infrastructure in a datacenter. Network Controller communicates with network devices using southbound APIs […]
How To Create Layout Features with Position and Z-Index in CSS
Elements of a website can interact with and overlay on top of one another in many different ways, making CSS layout challenging to control. One way to set the placement of an element is with a combination of the position property, z-index property, and the direction properties, which apply spacing values with top, right, bottom, and left. In this tutorial, you will create a page of content with a navigation element in the header, using he relative, absolute, and fixed position values.
Ubuntu 16.04 LTS UFW blocks expected traffic after rule changes
🟡 Medium ⏱ 5–30 min Last verified: 2 January 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 […]
Oracle Linux 8 — java-11-openjdk — security and stability fixes — required update (ELSA-2022-7012)
🟡 Medium ⏱ 10–30 min Last verified: 2 January 2021 Affected versions: Oracle Linux 8 📖 ~4 min read • Source: ELSA advisory ELSA-2022-7012 Related CVEs: CVE-2022-39399 CVE-2022-21624 CVE-2022-21626 CVE-2022-21618 CVE-2022-21619 CVE-2022-21628 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary Fix Solution – […]
Ubuntu 18.04 LTS – NFS mount hangs and causes boot timeout
🟠 High ⏱ 5–30 min Last verified: 2 January 2021 Affected versions: Ubuntu 18.04 LTS Ubuntu 18.04 Ubuntu 18.04.6 📖 ~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 […]
Platform Engineering vs DevOps: Why Enterprises Build IDPs
A practical enterprise guide to platform engineering, DevOps, and internal developer platforms that speed software delivery without weakening governance.
Ubuntu 20.04 slow boot due to long systemd startup
🟡 Medium ⏱ 5–30 min Last verified: 2 January 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 […]
How to Install Tekton Pipelines on Oracle Linux 8
Introduction Oracle Linux 8 ships with a stable, security-hardened base that makes deploying install tekton pipelines on oracle linux 8 both straightforward and auditable. This tutorial covers the complete procedure for how to Install Tekton Pipelines on Oracle Linux 8, including dnf module streams where applicable, systemd unit management, and the firewalld rules required for […]
How to Use iptrace for Network Tracing on IBM AIX 7.1
Introduction IBM AIX 7.1 is the latest release of IBM’s enterprise-grade UNIX operating system, running on IBM Power Systems hardware. Known for its reliability, security, and performance in mission-critical environments, AIX 7.1 introduces enhanced virtualization, security hardening, and cloud integration features. This guide covers how to use iptrace for network tracing on ibm aix 7.1 […]