Linux
Configure a Static IP on Ubuntu with Netplan
Configure a static IPv4 address on Ubuntu with Netplan, including interface discovery, YAML structure, default routes, DNS, safe testing, permissions,...
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Networking
BGP Explained: eBGP, iBGP, Path Selection and Troubleshooting
Understand BGP sessions, eBGP and iBGP, route attributes, path selection, filtering, communities, convergence, security, and a practical troubleshooti...
AWS
AWS VPC, Subnets, Route Tables and Peering Explained
Design AWS VPC networks with valid CIDR ranges, public and private subnets, route tables, gateways, security controls, DNS, peering, and systematic tr...
Kubernetes
Kubernetes Cluster Setup with kubeadm on Ubuntu
Build a Kubernetes cluster on Ubuntu with kubeadm and containerd, from host preparation and control-plane initialization to networking, worker joins,...
Cybersecurity
Symmetric vs Asymmetric Encryption: AES, RSA, ECC and TLS
Compare symmetric and asymmetric cryptography, including AES, RSA, elliptic-curve methods, key establishment, digital signatures, TLS and secure key m...
GitHub
GitHub for Beginners: Git, Repositories, Branches and Pull Requests
Learn GitHub fundamentals including Git, repositories, commits, branches, pull requests, authentication, collaboration, common commands and team workf...
Container Security
Scan Docker Images with Dockle for Security and Best Practices
Use Dockle to lint Docker and OCI images for risky configuration, sensitive files, missing health checks and container-image hardening issues.
Azure
Microsoft Azure Fundamentals: Cloud Concepts, Services and Architecture
Learn Azure cloud concepts, regions, availability zones, resource hierarchy, compute, networking, storage, identity, monitoring, governance and cost c...
Windows
Windows Spanned Volumes: Setup, Risks and Recovery
Understand Windows spanned volumes, their failure risks, current dynamic-disk limitations, safe setup steps, monitoring, backup and recovery options.