Troubleshooting

Use Apache mod_rewrite to return a 400 error for a specific URI and optionally block hotlinking from other domains. A quick .htaccess snippet that keeps unwanted traffic off a single page.

A visual walkthrough of the core networking components that make up an Amazon VPC, from subnets and gateways to security groups and route tables. Understanding how these pieces interact is essential for designing secure, well-segmented cloud networks.

A practical walkthrough for dumping Kafka topic data, including a generic consumer approach and a full Atlas-specific workflow covering JAAS configuration, Kerberos authentication, and log extraction.

A quick walkthrough for dumping the ATLAS_HOOK Kafka topic to inspect Atlas hook messages locally, including Kerberos authentication setup and consumer lag checks.

A practical guide to diagnosing impaired EC2 instances by detaching and reattaching EBS root volumes to a rescue instance. Covers the full workflow from stopping the impaired node to restoring it to normal service.

A quick walkthrough of using the Ranger REST API to bulk-delete existing users, including how to capture an auth cookie and loop through a user list with curl.