Infrastructure resources
Troubleshooting notes on servers, DNS, virtualization, cloud, Linux, DevOps and backup. Written from real work, not rewritten vendor documentation.
Azure VM Troubleshooting: Common Problems and Solutions
A practical guide to troubleshooting Azure Virtual Machines, including SSH and RDP failures, boot issues, disk problems, CPU and memory bottlenecks, NSG rules, networking, VM extensions and performance issues.
Read →AWS EBS Volume Troubleshooting and Performance Optimization
Learn how to troubleshoot AWS EBS volume issues, diagnose disk space and performance problems, monitor IOPS and throughput, expand filesystems, and optimize EBS volumes for production workloads.
Read →AWS Auto Scaling: How to Design Highly Available Applications
Learn how to design highly available AWS applications using Auto Scaling Groups, multiple Availability Zones, Application Load Balancers, health checks, scaling policies and resilient architecture patterns.
Read →AWS Load Balancer Troubleshooting: 502, 503 and 504 Errors Explained
Learn how to troubleshoot AWS Application Load Balancer 502, 503 and 504 errors by checking target health, security groups, ports, health checks, timeouts, DNS and backend applications. URL Slug
Read →AWS CloudWatch: Complete Monitoring and Alerting Guide
Learn how to monitor AWS infrastructure with CloudWatch metrics, logs, dashboards, alarms, CloudWatch Agent, Logs Insights, SNS notifications, and practical alerting strategies.
Read →AWS S3 Security: Common Misconfigurations and How to Fix Them
Learn how to secure Amazon S3 buckets by fixing common misconfigurations involving public access, IAM policies, bucket policies, encryption, object ownership, logging, versioning, and data protection.
Read →AWS VPC Troubleshooting: 10 Common Networking Problems and Fixes
Troubleshoot common AWS VPC networking problems including unreachable EC2 instances, security groups, NACLs, route tables, NAT Gateway, DNS, internet connectivity, and VPC peering issues.
Read →Ransomware-Proof Backups: Immutable Backup Architecture
Learn how immutable backups can protect cloud infrastructure from ransomware. Explore backup architecture, S3 Object Lock, retention policies, isolated backup accounts, recovery testing, and practical AWS security controls.
Read →AWS IAM Best Practices: How to Secure Your Cloud Infrastructure
Learn the essential AWS IAM best practices for securing cloud infrastructure, including least privilege, MFA, IAM roles, access keys, policies, root account protection, CloudTrail monitoring, and regular access reviews.
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