Edit a File in a Running Kubernetes Pod: a Non-Root Container Case
Learn how to edit a file in a running Kubernetes Pod when the container's user has no write access to it.
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Edit a File in a Running Kubernetes Pod: a Distroless Container Case
Learn how to edit a file in a distroless container that runs as a non-root user in a Kubernetes namespace that enforces the baseline Pod Security Standard.
Use a Kubernetes Job to Test NATS Pub/Sub
by Omkar Shelke
A payment service subscribes to payment requests through NATS. Run the checkout team's test script as a Job in the checkout namespace, with the required settings, and make sure the payment request arrives.
Challenge on Kubernetes
Fix a Deployment Stuck in ImagePullBackOff
by Omkar Shelke
A freshly rolled out Deployment has its Pods stuck in ImagePullBackOff, and the catalog page it serves returns 503. Read what the cluster reports about the failed pulls, find out why the image does not pull, and get the Pods running.
Troubleshoot Kubernetes Pods with kubectl debug
Practice using 'kubectl debug' to troubleshoot Kubernetes Pods when 'kubectl exec' isn't enough. Learn how to inspect processes, access files, and work around security restrictions using ephemeral containers.
Learn Linux by Fixing Broken Servers
Practice Linux troubleshooting on deliberately broken servers. Investigate vague failures, find the root cause, and make the system work again.