Practical Labs

niches/code/ai/agentic/jhu-whiting-agentic · notes · ref · Johns Hopkins Whiting AI and Agentic AI Engineering · Certification

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niches/code/ai/ml/uta-mccombs-ai-ml · notes · ref · UT Austin McCombs AI/ML: Business Applications · Certification

1. FoodHub - Python Foundations and Data Analysis — Analyze food orders, ratings, spending, and delivery times to recommend service improvements.

   Complete · Project · Updated 2026-10-12 · data-analysis · data-visualization · exploratory-data-analysis · matplotlib · numpy · pandas · python · seaborn · uta-mccombs-ai-ml · Solution · Completed 2026-04-26 · ref

2. Personal Loan Campaign - ML — Predict which bank customers will accept a personal loan offer.

   Planned · Project · Updated 2026-10-12 · classification · exploratory-data-analysis · model-evaluation · pandas · python · scikit-learn · uta-mccombs-ai-ml · ref

3. EasyVisa - Advanced ML — Compare models that predict whether a visa application will be certified.

   Planned · Project · Updated 2026-10-12 · classification · ensemble-learning · model-evaluation · pandas · python · scikit-learn · uta-mccombs-ai-ml · ref

4. Employee Promotion - Advanced ML — Compare promotion models and ways to balance data with few promotions.

   Complete · Project · Updated 2026-10-12 · classification · ensemble-learning · imbalanced-classification · model-evaluation · imbalanced-learn · pandas · python · scikit-learn · xgboost · uta-mccombs-ai-ml · Solution · Completed 2026-08-09 · ref

5. ReneWind - Neural Networks — Compare neural networks that use sensor readings to predict wind turbine failures.

   Complete · Project · Updated 2026-10-12 · classification · model-evaluation · neural-networks · predictive-maintenance · keras · pandas · python · scikit-learn · tensorflow · uta-mccombs-ai-ml · Solution · Completed 2026-07-26 · ref

6. Medical Assistant - NLP and Generative AI — Compare answers with and without medical manual passages, then check whether the manual supports them.

   Complete · Project · Updated 2026-10-12 · document-processing · model-evaluation · prompt-design · retrieval-augmented-generation · chroma · langchain · llama-cpp-python · python · sentence-transformers · uta-mccombs-ai-ml · Solution · Completed 2026-08-30 · ref

7. Last-Mile Delivery - Agents for Automation — Handle delivery problems using tools, the playbook, customer messages, and review.

   Complete · Project · Updated 2026-10-12 · model-evaluation · orchestration · retrieval-augmented-generation · structured-output · workflow-automation · langchain · langgraph · openai · pydantic · python · sqlite · uta-mccombs-ai-ml · Solution · Completed 2026-10-04 · ref

niches/study/cloud/aws/clf-c02 · AWS Certified Cloud Practitioner (CLF-C02) · Certification

• CloudCertPrep CLF-C02 Question Bank — Review selected AWS Cloud Practitioner questions and explain the reasoning behind each answer.

  Planned · Question Bank · Updated 2026-10-12 · billing-pricing · cloud-concepts · security-compliance · aws · aws-clf-c02 · ref

• Kananinirav CLF-C02 Review — Explain and compare cloud computing, IAM, EC2, S3, and VPC concepts from a bounded set of linked notes.

  Planned · Problem Set · Updated 2026-10-12 · cloud-computing · aws · ec2 · iam · s3 · vpc · aws-clf-c02 · ref

niches/code/cloud/aws/devroadmaps · ref

• Multi-Region Architecture — Design and implement a highly available multi-region architecture with failover and data replication.

  Planned · Project · Updated 2026-10-12 · data-replication · disaster-recovery · high-availability · aws · dynamodb-streams · route53 · ref

• Serverless API — Build a serverless REST API using AWS Lambda, API Gateway, DynamoDB, and Cognito.

  Planned · Project · Updated 2026-10-12 · api-development · serverless-computing · api-gateway · aws-lambda · dynamodb · ref

niches/code/cloud/azure/az-104 · ref

• Implement Azure Virtual Networking — Build two Azure networks, inspect security rules, and verify public and private DNS.

  Planned · Exercise · Updated 2026-10-12 · dns · firewalls · infrastructure-as-code · networking · arm-templates · azure · azure-dns · ref

niches/code/cloud/azure/az-700 · ref

• Connect Azure Networks with Global Peering — Compare VM connectivity before and after configuring peering between Azure networks.

  Planned · Exercise · Updated 2026-10-12 · networking · remote-access · troubleshooting · azure · azure-powershell · ref

niches/code/cloud/gcp/google-codelabs · ref

• Hello Cloud Run with Python — Deploy a Python HTTP service from source and inspect the Cloud Run revision and response.

  Planned · Exercise · Updated 2026-10-12 · api-development · deployment · serverless-computing · cloud-run · gcloud · gcp · python · ref

niches/code/cloud/gcp/google-skills · ref

• GSP315 App Development Environment — Configure an event-driven photo workflow and access permissions in a timed Google Cloud challenge.

  Planned · Challenge · Updated 2026-10-12 · access-control · object-storage · serverless-computing · troubleshooting · cloud-run-functions · cloud-storage · gcp · pubsub · ref

niches/code/data/sql/pgexercises · ref

• Join Members, Bookings, and Facilities — Join three relational tables and verify duplicate handling, projection, and result ordering.

  Planned · Exercise · Updated 2026-10-12 · data-validation · relational-querying · postgresql · sql · ref

niches/code/devops/devroadmaps · ref

• CI/CD Pipeline — Set up a GitHub Actions pipeline that tests, builds, and deploys a Node.js app to a cloud server.

  Planned · Project · Updated 2026-10-12 · ci-cd · deployment · docker · github-actions · linux · ref

• GitOps Deployment — Implement GitOps with ArgoCD for automated deployments from Git to Kubernetes.

  Planned · Project · Updated 2026-10-12 · deployment · gitops · argocd · helm · kubernetes · ref

• Infrastructure as Code — Provision a complete AWS environment (VPC, EC2, RDS) using Terraform modules.

  Planned · Project · Updated 2026-10-12 · configuration-management · infrastructure-as-code · aws · git · terraform · ref

• Kubernetes Cluster — Set up a production-ready K8s cluster with ingress, autoscaling, secrets management, and backup.

  Planned · Project · Updated 2026-10-12 · cluster-administration · orchestration · cert-manager · helm · kubernetes · ref

• Monitoring Stack — Deploy Prometheus, Grafana, and Alertmanager to monitor a microservices application.

  Planned · Project · Updated 2026-10-12 · monitoring · observability · docker · grafana · prometheus · ref

niches/code/devops/roadmap-sh · notes · ref

1. Server Performance Stats — Write a script that reports basic Linux server performance statistics.

   Complete · Project · Updated 2026-10-12 · filesystems · performance-monitoring · process-inspection · resource-metrics · bash · linux · Solution · Completed 2026-10-11 · ref

2. Log Archive Tool — Build a command-line tool that archives logs with a dated filename.

   Complete · Project · Updated 2026-10-12 · archiving · command-line · compression · log-management · timestamps · python · Solution · Completed 2026-10-11 · ref

3. Nginx Log Analyser — Analyze Nginx logs from the command line.

   Planned · Project · Updated 2026-10-12 · command-line · log-analysis · shell-scripting · text-processing · awk · bash · ref

4. GitHub Pages Deployment — Create a GitHub Actions workflow that deploys a static site to GitHub Pages.

   Planned · Project · Updated 2026-10-12 · ci-cd · deployment · git · github-actions · github-pages · ref

5. SSH Remote Server Setup — Configure a Linux server for remote SSH access.

   Planned · Project · Updated 2026-10-12 · key-management · remote-access · linux · ssh · ref

6. Static Site Server — Configure a Linux server to serve a static website.

   Planned · Project · Updated 2026-10-12 · deployment · static-sites · linux · nginx · rsync · ssh · ref

7. Basic DNS Setup — Set up a custom domain and its basic DNS records.

   Planned · Project · Updated 2026-10-12 · cloud-hosting · dns · domain-names · networking · ref

8. Simple Monitoring — Set up a basic Netdata monitoring dashboard.

   Planned · Project · Updated 2026-10-12 · alerting · dashboarding · metrics · monitoring · observability · shell-scripting · linux · netdata · ref

9. Dummy Systemd Service — Create a long-running systemd service that writes to a log file.

   Planned · Project · Updated 2026-10-12 · process-management · services · journald · linux · systemd · ref

10. Basic Dockerfile — Build a Dockerfile for a basic application image.

    Planned · Project · Updated 2026-10-12 · containers · image-building · docker · ref

11. EC2 Instance — Create an EC2 instance and connect to it over SSH.

    Planned · Project · Updated 2026-10-12 · cloud-computing · networking · aws · ec2 · ssh · ref

12. Pomodoro Timer — Build a Pomodoro tracker application.

    Planned · Project · Updated 2026-10-12 · accessibility · frontend-development · state-management · timer-logic · css · html · javascript · ref

13. Configuration Management — Write an Ansible playbook that configures a Linux server.

    Planned · Project · Updated 2026-10-12 · automation · configuration-management · idempotency · ansible · linux · ref

14. IaC on DigitalOcean — Provision a DigitalOcean Droplet with Terraform.

    Planned · Project · Updated 2026-10-12 · cloud-computing · infrastructure-as-code · digitalocean · terraform · ref

15. Node.js Service Deployment — Deploy a Node.js service to a remote server with GitHub Actions.

    Planned · Project · Updated 2026-10-12 · ci-cd · deployment · github-actions · nodejs · ssh · ref

16. Dockerized Service — Deploy a Dockerized Node.js service with GitHub Actions.

    Planned · Project · Updated 2026-10-12 · ci-cd · deployment · docker · github-actions · nodejs · ref

17. Multi-Container Application — Run a multi-container application with Docker Compose.

    Planned · Project · Updated 2026-10-12 · containers · service-networking · docker · docker-compose · ref

18. Automated DB Backups — Schedule database backups every twelve hours.

    Planned · Project · Updated 2026-10-12 · automation · backup-and-recovery · database-backups · object-storage · scheduling · workflow-automation · mongodb · ref

19. Bastion Host — Set up a bastion host for access to private infrastructure.

    Planned · Project · Updated 2026-10-12 · access-control · bastion-hosts · networking · security · ssh · ref

20. File Integrity Checker — Check application log files for tampering.

    Planned · Project · Updated 2026-10-12 · cryptographic-hashing · file-integrity · filesystems · monitoring · security · ref

21. Linux Server Setup — Set up and secure a Linux server from scratch.

    Planned · Project · Updated 2026-10-12 · firewalls · hardening · system-administration · user-management · linux · ref

22. VPN Server Setup — Configure a WireGuard or OpenVPN server for remote access.

    Planned · Project · Updated 2026-10-12 · cryptography · networking · vpn · linux · openvpn · wireguard · ref

23. Blue-Green Deployment — Set up a blue-green deployment for an application.

    Planned · Project · Updated 2026-10-12 · ci-cd · deployment-strategies · load-balancing · rollback · ref

24. Prometheus and Grafana — Collect metrics with Prometheus and visualize them in Grafana.

    Planned · Project · Updated 2026-10-12 · metrics · monitoring · observability · grafana · prometheus · ref

25. Multi-Service Application — Set up an optimized multi-service Docker application.

    Complete · Project · Updated 2026-10-12 · multi-service-architecture · optimization · service-networking · docker · docker-compose · Solution · Completed 2026-10-12 · ref

26. Service Discovery — Set up service discovery for dummy services with Consul.

    Complete · Project · Updated 2026-10-12 · dns · networking · service-discovery · consul · Solution · Completed 2026-10-12 · ref

niches/code/devops/technical-assessments

• AWS Terraform Engineering Challenge — Provision AWS web infrastructure with Terraform for a Reframe Data Services interview assessment.

  Complete · Challenge · Updated 2026-10-12 · infrastructure-as-code · networking · aws · bash · github-actions · make · terraform · Solution · Completed 2026-09-12 · ref

• Rearc Quest — Cloud Deployment Challenge — Deploy a containerized web app on AWS for Rearc’s April 2023 interview assessment; solution repository is private.

  Complete · Challenge · Updated 2026-10-12 · ci-cd · infrastructure-as-code · networking · aws · circleci · docker · make · terraform · 🔒 Solution · Completed 2023-04-30 · ref

niches/code/devops/containers/docker-guides · ref

• Multi-container Application with Docker Compose — Run the same proxy, web, and Redis stack manually and with Compose; compare behavior.

  Planned · Exercise · Updated 2026-10-12 · configuration-management · containers · service-networking · troubleshooting · docker · docker-compose · nginx · nodejs · redis · ref

niches/code/devops/infrastructure-as-code/terraform-docker · ref

• Build, Change, and Destroy Local Infrastructure — Manage a local Docker container through Terraform plans, state, updates, and teardown.

  Planned · Exercise · Updated 2026-10-12 · idempotency · infrastructure-as-code · state-management · docker · nginx · terraform · ref

niches/study/devops/orchestration/kubernetes/cka · ref · Certified Kubernetes Administrator (CKA) · Certification

• CKA objectives review — Explain cluster administration, workloads, networking, storage and diagnostic choices using pinned CKA objectives.

  Planned · Problem Set · Updated 2026-10-12 · conceptual-reasoning · orchestration · troubleshooting · kubernetes · cka · ref

niches/code/devops/orchestration/kubernetes/cka/ck-x · ref · Certified Kubernetes Administrator (CKA) · Certification

• CKA Practice Lab - Core Concepts — Practice core Kubernetes administration across a complete linked assessment.

  Planned · Problem Set · Updated 2026-10-12 · orchestration · troubleshooting · kubernetes · cka · ref

• CKA Practice Lab - Advanced Administration — Work through advanced Kubernetes administration and troubleshooting scenarios.

  Planned · Problem Set · Updated 2026-10-12 · orchestration · troubleshooting · kubernetes · cka · ref

niches/code/devops/orchestration/kubernetes/cka/platformlab-exercises · ref · Certified Kubernetes Administrator (CKA) · Certification

1. Exercise 01 — Pod Basics — Create a Pod with labels and resource limits, then inspect its state and network address.

   Complete · Exercise · Updated 2026-10-12 · orchestration · resource-management · kubernetes · cka · Solution · Completed 2026-10-12 · ref

2. Exercise 02 — Multi-Container Pod (Sidecar Logging) — Run an application and a logging sidecar with a shared volume.

   Planned · Exercise · Updated 2026-10-12 · containers · log-management · orchestration · kubernetes · cka · ref

3. Exercise 03 — ConfigMap and Secret — Supply application settings and credentials through ConfigMaps, Secrets and mounted files.

   Planned · Exercise · Updated 2026-10-12 · configuration-management · orchestration · kubernetes · cka · ref

4. Exercise 04 — RBAC — Grant and verify namespace and cluster permissions with roles and service accounts.

   Planned · Exercise · Updated 2026-10-12 · access-control · orchestration · kubernetes · cka · ref

5. Exercise 05 — NetworkPolicy — Restrict Pod traffic with network policies while preserving required DNS access.

   Planned · Exercise · Updated 2026-10-12 · access-control · networking · orchestration · kubernetes · cka · ref

6. Exercise 06 — Deployment Rolling Update and Rollback — Update a Deployment, inspect its rollout history and roll back to an earlier revision.

   Planned · Exercise · Updated 2026-10-12 · deployment · orchestration · rollback · kubernetes · cka · ref

7. Exercise 07 — StatefulSet Deployment — Deploy a StatefulSet and check stable identities, persistent storage and scaling behavior.

   Planned · Exercise · Updated 2026-10-12 · deployment · orchestration · storage-management · kubernetes · cka · ref

8. Exercise 08 — Node Drain and Cordon — Cordon and drain a worker node, then restore it to workload scheduling.

   Planned · Exercise · Updated 2026-10-12 · cluster-maintenance · orchestration · scheduling · kubernetes · cka · ref

9. Exercise 09 — kubeadm Cluster Upgrade — Plan a minor-version cluster upgrade and work through control-plane and worker-node updates.

   Planned · Exercise · Updated 2026-10-12 · cluster-maintenance · orchestration · kubeadm · kubernetes · cka · ref

10. Exercise 10 — Static Pod — Manage a static Pod through the kubelet manifest directory and observe its lifecycle.

    Planned · Exercise · Updated 2026-10-12 · orchestration · system-administration · kubernetes · cka · ref

11. Exercise 11 — Troubleshoot Cluster Components — Diagnose and repair failures affecting kubelet, cluster networking and DNS.

    Planned · Exercise · Updated 2026-10-12 · orchestration · troubleshooting · kubernetes · cka · ref

12. Exercise 12 — Storage: PV, PVC, and StorageClass — Provision persistent storage, bind a claim and verify that a Pod can use the volume.

    Planned · Exercise · Updated 2026-10-12 · orchestration · storage-management · kubernetes · cka · ref

13. Exercise 13 — Helm Install, Upgrade, and Rollback — Install a Helm chart, change release values, upgrade it and roll back.

    Planned · Exercise · Updated 2026-10-12 · deployment · orchestration · rollback · helm · kubernetes · cka · ref

14. Exercise 14 — Kustomize: Base and Overlay — Build a shared deployment base and an environment-specific Kustomize overlay.

    Planned · Exercise · Updated 2026-10-12 · configuration-management · deployment · orchestration · kubernetes · kustomize · cka · ref

15. Exercise 15 — Gateway API: Gateway and HTTPRoute — Route HTTP traffic from a Gateway to a backend Service with an HTTPRoute.

    Planned · Exercise · Updated 2026-10-12 · orchestration · service-networking · kubernetes · cka · ref

16. Exercise 16 — Horizontal Pod Autoscaler — Configure CPU-based Pod autoscaling and observe its response to load.

    Planned · Exercise · Updated 2026-10-12 · orchestration · resource-management · kubernetes · cka · ref

17. Exercise 17 — kubectl debug: Pod and Node — Use debug containers to inspect running Pods and node-level resources.

    Planned · Exercise · Updated 2026-10-12 · orchestration · troubleshooting · kubernetes · cka · ref

18. Exercise 18 — CRI-dockerd Installation & Configuration — Prepare a node and configure cri-dockerd as its container runtime.

    Planned · Exercise · Updated 2026-10-12 · orchestration · system-administration · cri-dockerd · docker · kubernetes · cka · ref

19. Exercise 19 — Classic Ingress — Configure path-based Ingress routing, TLS termination and an IngressClass.

    Planned · Exercise · Updated 2026-10-12 · orchestration · service-networking · kubernetes · cka · ref

20. Exercise 20 — Pod Security Standards — Apply namespace Pod Security Standards and inspect which workloads are admitted.

    Planned · Exercise · Updated 2026-10-12 · access-control · orchestration · security · kubernetes · cka · ref

21. Exercise 21 — Jobs and CronJobs — Run batch work with a Job and configure a recurring CronJob with history limits.

    Planned · Exercise · Updated 2026-10-12 · orchestration · scheduling · kubernetes · cka · ref

22. Exercise 22 — PriorityClass — Compare workload scheduling and preemption under different PriorityClasses.

    Planned · Exercise · Updated 2026-10-12 · orchestration · resource-management · scheduling · kubernetes · cka · ref

23. Exercise 23 — Resource Requests Tuning (Pods Won't Schedule) — Diagnose Pending Pods and adjust resource requests to fit node capacity.

    Planned · Exercise · Updated 2026-10-12 · orchestration · resource-management · troubleshooting · kubernetes · cka · ref

24. Exercise 24 — PriorityClass and Patch Operations — Assign workload priority and patch the configuration of an existing Deployment.

    Planned · Exercise · Updated 2026-10-12 · configuration-management · orchestration · scheduling · kubernetes · cka · ref

25. Exercise 25 — Storage with WaitForFirstConsumer Binding — Trace delayed volume binding until a consuming Pod can be scheduled.

    Planned · Exercise · Updated 2026-10-12 · orchestration · scheduling · storage-management · kubernetes · cka · ref

26. Exercise 26 — CRI-dockerd Installation and Configuration — Install cri-dockerd, configure node networking prerequisites and verify the runtime socket.

    Planned · Exercise · Updated 2026-10-12 · orchestration · system-administration · cri-dockerd · docker · kubernetes · cka · ref

27. Exercise 27 — CNI Installation (Calico/Tigera Operator) — Install Calico with the Tigera Operator and verify networking between nodes.

    Planned · Exercise · Updated 2026-10-12 · networking · orchestration · calico · kubernetes · tigera-operator · cka · ref

28. Exercise 28 — Complex NetworkPolicy (Multi-Namespace, Traffic Control) — Build and diagnose ingress and egress policies spanning multiple namespaces.

    Planned · Exercise · Updated 2026-10-12 · networking · orchestration · troubleshooting · kubernetes · cka · ref

29. Exercise 29 — Troubleshoot Broken Cluster (Incorrect etcd Endpoint) — Find and correct an API server configuration pointing to the wrong etcd endpoint.

    Planned · Exercise · Updated 2026-10-12 · configuration-management · orchestration · troubleshooting · kubernetes · cka · ref

30. Exercise 30 — TLS Configuration Update (Cipher Support) — Change a service’s TLS configuration and check the supported protocol versions.

    Planned · Exercise · Updated 2026-10-12 · configuration-management · orchestration · security · kubernetes · cka · ref

31. Exercise 31 — Argo CD Setup (GitOps Deployment) — Configure Argo CD to deploy an application from a Git repository.

    Planned · Exercise · Updated 2026-10-12 · deployment · gitops · orchestration · argocd · git · kubernetes · cka · ref

niches/code/devops/orchestration/kubernetes/cka/platformlab-mock-exams · ref · Certified Kubernetes Administrator (CKA) · Certification

1. Mock Exam 01 — CKA Practice (Kubernetes 1.35) — Attempt a complete CKA mock covering cluster administration, workloads, networking, storage and troubleshooting.

   Planned · Problem Set · Updated 2026-10-12 · orchestration · troubleshooting · kubernetes · cka · ref

2. Mock Exam 02 — CKA Practice (Kubernetes 1.35) — Attempt a complete CKA mock covering cluster administration, workloads, networking, storage and troubleshooting.

   Planned · Problem Set · Updated 2026-10-12 · orchestration · troubleshooting · kubernetes · cka · ref

niches/study/devops/orchestration/kubernetes/ckad · ref · Certified Kubernetes Application Developer (CKAD) · Certification

• CKAD objectives review — Compare application design, deployment, configuration and troubleshooting choices using pinned CKAD objectives.

  Planned · Problem Set · Updated 2026-10-12 · conceptual-reasoning · orchestration · troubleshooting · kubernetes · ckad · ref

niches/code/devops/orchestration/kubernetes/ckad/ck-x · ref · Certified Kubernetes Application Developer (CKAD) · Certification

• CKAD Comprehensive Lab - 1 — Practice application configuration, deployment and maintenance across a linked assessment.

  Planned · Problem Set · Updated 2026-10-12 · orchestration · troubleshooting · kubernetes · ckad · ref

• CKAD Comprehensive Lab - 2 — Work through a second set of Kubernetes application development and troubleshooting tasks.

  Planned · Problem Set · Updated 2026-10-12 · orchestration · troubleshooting · kubernetes · ckad · ref

niches/study/devops/orchestration/kubernetes/cks · ref · Certified Kubernetes Security Specialist (CKS) · Certification

• CKS objectives review — Explain Kubernetes access, hardening, supply-chain and runtime security choices using pinned CKS objectives.

  Planned · Problem Set · Updated 2026-10-12 · conceptual-reasoning · orchestration · troubleshooting · kubernetes · cks · ref

niches/code/devops/orchestration/kubernetes/cks/ck-x · ref · Certified Kubernetes Security Specialist (CKS) · Certification

• CKS Practice Lab - Kubernetes Security Essentials — Practice Kubernetes hardening, access control and workload security across a linked assessment.

  Planned · Problem Set · Updated 2026-10-12 · orchestration · troubleshooting · kubernetes · cks · ref

niches/code/mathematics/project-euler · ref

1. Multiples of 3 or 5 — Find the sum of positive multiples of 3 or 5 below 1000.

   Complete · Exercise · Updated 2026-10-12 · arithmetic · divisibility · python · Solution · Completed 2026-10-12 · ref

niches/code/programming/bash/exercism · ref

• Bash Error Handling — Handle command-line argument counts, quoting, and failure exit codes in a Bash script.

  Complete · Exercise · Updated 2026-10-12 · command-line · error-handling · shell-scripting · bash · bats · python · unittest · Solution · Completed 2026-10-12 · ref

niches/code/programming/go/gophercises · ref

• CSV Quiz — Build a CSV quiz command, then add a timer that can interrupt waiting for input.

  In progress · Project · Updated 2026-10-12 · automated-testing · command-line · data-parsing · go · Solution · ref

niches/code/programming/python/exercism · ref

• Grep in Python — Implement a fixed-string file search with composable flags and deterministic output.

  Complete · Exercise · Updated 2026-10-12 · automated-testing · command-line · filesystems · text-processing · grep · python · unittest · Solution · Completed 2026-10-12 · ref

niches/code/security/web/portswigger · ref

• User Role Controlled by Request Parameter — Investigate client-controlled authorization and explain a server-side fix in a hosted lab.

  Planned · Exercise · Updated 2026-10-12 · access-control · security · troubleshooting · burp-suite · http · ref