Infrastructure & Systems
AWS ANS-C01: Hybrid Connectivity Troubleshooting
Hybrid AWS outages are difficult because the failure can sit in several administrative domains at once: an on-premises router, a…
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119 published articles in this category.
Infrastructure & Systems
AWS SAA-C03: Backup and Cross-Region Recovery
Backup architecture in AWS should answer a recovery question, not merely produce recovery points. A backup is useful only if…
Infrastructure & Systems
AWS SAA-C03: Cost Optimization with Compute and Storage Choices
Cost optimization in AWS is an engineering discipline, not a monthly exercise in finding the largest line item and shrinking…
Infrastructure & Systems
Microsoft AI-102: Windows Server Hybrid Path After AZ-800/801
Microsoft retired AZ-800, AZ-801, and the Windows Server Hybrid Administrator Associate certification on September 30, 2026. Unlike some other 2026…
Infrastructure & Systems
Microsoft AZ-104: Azure Backup and Recovery Services Vault Design
Azure Backup design is easy to underestimate because the first visible object is a vault and the first visible action…
Infrastructure & Systems
LPI 201-450: Linux Kernel, Modules, and Boot Process
The Linux boot process connects firmware, a bootloader, the kernel, the initial RAM filesystem, device initialization, and the system's service…
Infrastructure & Systems
LPI 101-500: Bash Redirection, Pipes, and Text Processing
Bash becomes powerful when commands are connected rather than run one at a time. Redirection controls where input and output…
Infrastructure & Systems
LPI 101-500: Linux Filesystem Hierarchy and Mounting
A Linux administrator has to know more than how to create files. The system only becomes predictable when you understand…
Infrastructure & Systems
LPI 101-500: Linux Package Management Across Linux Distros
Package management is the mechanism that turns a Linux installation from a static image into a maintainable operating system. It…
Infrastructure & Systems
LPI 010-160: Containers and Virtualization on Linux
Containers and virtual machines are often introduced as competing technologies, but on Linux they solve different isolation and packaging problems…
Infrastructure & Systems
LPI 010-160: Linux Permissions & Ownership
Linux permissions answer a deceptively simple question: who is allowed to do what with this file or directory? The current…
Infrastructure & Systems
Splunk SPLK-1003: Forwarders & Distributed Architecture
Splunk Forwarders & Distributed Architecture belongs inside Splunk data collection, search, knowledge management, and security analytics because the topic affects…
Infrastructure & Systems
CNCF CKA: etcd Backup and Cluster Recovery
A Kubernetes cluster can survive many workload failures without losing its identity, but the control plane depends on a much…
Infrastructure & Systems
Red Hat EX200: LVM Storage Management in RHEL
Logical Volume Manager gives RHEL administrators a flexible layer between physical block devices and filesystems. Instead of treating every disk…
Infrastructure & Systems
Red Hat EX200: RHEL User and Group Administration
User and group administration is one of the foundations of RHEL security. Local accounts determine who can log in, file…