Broaden your Kubernetes expertise with a curated feed of news, articles and best practices. Mastodon: learnk8s@learnk8s.news
More K8s news, events, jobs →
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This repo contains questions and exercises on various technical topics related to DevOps and SRE:
- Kubernetes
- OpenShift
- AWS
- Cloud
- DevOps
- CI/CD
- GCP
- Big Data
- Databases
And more
github.com/bregman-arie/devo…
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In this repository, you will find Michael's notes on his journey in the DevOps world. You will learn:
- Linux basics & networking
- Containers
- Kubernetes
- Terraform
- Ansible
- Monitoring and logging
- CI/CD with GitHub actions
- And more
➜ github.com/MichaelCade/90Day…
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In this repository, you will find Michael's notes on his journey in the DevOps world. You will learn:
- Linux basics & networking
- Containers
- Kubernetes
- Terraform
- Ansible
- Monitoring and logging
- CI/CD with GitHub actions
- And more
➤ github.com/MichaelCade/90Day…
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🧵How do you keep up with Kubernetes?
If you are looking for curated Kubernetes news, we have you covered on:
- Core Kubernetes
- Security
- Architecture & development
- Job opportunities
- K3s
Here are the accounts that you should follow:
ALT Links: - Learnk8s (K8s news) | Twitter: https://twitter.com/learnk8s Telegram: https://t.me/Learnk8sNews - Kube Careers (Job opportunities) | Twitter: https://twitter.com/kubecareers | Telegram: https://t.me/KubeCareers - Kubesploit (K8s security) | Twitter: https://twitter.com/kubesploit Telegram: https://t.me/Kubesploit - Kubernetes Architect (Development) | Twitter: https://twitter.com/k8sarchitect Telegram: https://lnkd.in/gfKXNcsY - K3s Daily (K3s news) | Twitter: https://twitter.com/k3sdaily Telegram: https://t.me/K3sDaily
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This repo contains questions and exercises on various technical topics related to DevOps and SRE:
- Kubernetes
- OpenShift
- AWS
- Cloud
- DevOps
- CI/CD
- GCP
- Big Data
- Databases
And more
➜ github.com/bregman-arie/devo…
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Kubernetes for everyone is a Google Docs document that collects answers to several questions about Kubernetes
bit.ly/34Lk6a9
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How do packets flow inside and outside a Kubernetes cluster?
In this article, you will learn to trace the traffic in your cluster, starting from the initial web request and down to the container hosting the application.
learnk8s.io/kubernetes-netwo…
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Kor is a tool to discover unused Kubernetes resources
Currently, Kor can identify and list unused:
- ConfigMaps
- Secrets
- Services
- ServiceAccounts
- Deployments
- Statefulsets
- Roles
➤ github.com/yonahd/kor
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Troubleshooting in Kubernetes can be a daunting task
In this article, you will learn how to diagnose issues in Pods, Services and Ingress
➤ learnk8s.io/troubleshooting-…
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When something goes wrong in Kubernetes, how do you know what should be fixed?
Is the issue in the Pod? ReplicaSet? Ingress?
This flowchart will guide to troubleshoot your apps: learnk8s.io/troubleshooting-…
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How do you keep up with Kubernetes?
If you are looking for curated Kubernetes news, we have you covered on:
- Core Kubernetes
- Security
- Architecture & development
- Job opportunities
- K3s
- Events
➜ learnk8s.io/news
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How does Pod to Pod communication work in Kubernetes?
How does the traffic reach the pod?
In this article, you will dive into how low-level networking works in Kubernetes
➤ dev.to/danielepolencic/traci…
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Kor is a tool to discover unused Kubernetes resources
Currently, Kor can identify and list unused:
- ConfigMaps
- Secrets
- Services
- ServiceAccounts
- Deployments
- Statefulsets
- Roles
➜ github.com/yonahd/kor
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In this repository, you will find a variety of open-source Grafana dashboards, typically for AWS and Kubernetes
➜ github.com/DevOps-Nirvana/Gr…
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This repository contains a modern set of Grafana dashboards for Kubernetes
➜ github.com/dotdc/grafana-das…
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Certified Kubernetes Administrator CKA course notes — diagrams for each subject area and use as reference for future refresher
bit.ly/31cFMKM
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In this article, you will find a set of modern Grafana dashboards for Kubernetes and the reasoning behind them
➜ medium.com/@dotdc/a-set-of-m…
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Checkov is a static code analysis tool for infrastructure-as-code.
It scans cloud infrastructure provisioned using Terraform, Cloudformation, Kubernetes, Serverless or ARM Templates and detects security and compliance misconfigurations.
bit.ly/3lq6GGy
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What do you do when your deployments don't work in Kubernetes?
1. Despair
2. Check out this handy flow chart with all possible outcomes and useful commands
Don't despair!
We have 👉2️⃣
Full article (and downloadable PDF) here: learnk8s.io/troubleshooting-…
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What's the best Ingress Controller?
We've updated the Ingress controller comparison spreadsheet to 16 controllers!
There are also more categories such as Cert Manager integration, Hot Reloading and Proxy Protocol support, etc.
Check it out here: docs.google.com/spreadsheets…
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How does Pod to Pod communication work in Kubernetes?
How does the traffic reach the pod?
In this article, you will dive into how low-level networking works in Kubernetes
➜ dev.to/danielepolencic/traci…
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This repository contains a modern set of Grafana dashboards for Kubernetes
➤ github.com/dotdc/grafana-das…
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How do you choose the *right* Kubernetes Ingress controller when:
- Not all Ingress controllers support UDP
- Only Kong has a free LDAP integration
- Nginx Ingress and HAProxy are the only two ingress without CRDs
We've put together a comparison:
docs.google.com/spreadsheets…
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Kubernetes for everyone is a Google Docs document that collects several topics related to Kubernetes
bit.ly/30TS6OX
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IAM roles for Kubernetes service accounts - deep dive
Read on mjarosie.github.io/dev/2021/…
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Certified Kubernetes Security Specialist Study Guide
Read on: bit.ly/3reoG97
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In this article, you'll learn how to extend Kubernetes API with:
- Kubernetes Custom Resources
- Kubernetes Custom Controllers
- Kubernetes Admission Webhooks
iximiuz.com/en/posts/kuberne…
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The correct graceful shutdown sequence in Kubernetes is:
1. capture SIGTERM
2. stop accepting new connections
3. complete active requests
4. kills keepalive
5. exit
kube-sigterm-test is a tool designed to test graceful termination of Pods/containers
bit.ly/38iX6yE
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This repository contains a modern set of Grafana dashboards for Kubernetes
➜ ku.bz/408QCTLSW
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The `/proc` directory is a special directory that holds all the details about our Linux system, such as — kernel, processes, and configuration parameters
In this article, you will learn how to explore the directory in a Kubernetes cluster
➜ levelup.gitconnected.com/acc…
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In this series of articles you will learn about Kubernetes networking:
➀ Linux namespaces and Networking namespace
➁ Intra pod networking & pause container
➂ Kubernetes networking model
➜ sanjimoh.medium.com/demystif…
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Are you following best practices for your Kubernetes adoption?
Is the cluster secure and production-ready?
We’ve curated a list of best practices for Kubernetes to help you drive your roadmap to production.
Find it here
learnk8s.io/production-best-…
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In this repository, you will find the resources to study for the CKA exam
You'll also learn more about Kubernetes concepts that are not in the exam, such as EKS, operators, Helm, Prometheus, and how to install and set up a cluster from scratch
➜ github.com/alifiroozi80/CKA
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The `/proc` directory is a special directory that holds all the details about our Linux system, such as — kernel, processes, and configuration parameters
In this article, you will learn how to explore the directory in a Kubernetes cluster
➤ levelup.gitconnected.com/acc…
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47 things that you should know to be a Kubernetes experts (questions + answers)
👉 ymmt2005.hatenablog.com/entr…
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A list of useful tools for developers running applications in Kubernetes
- Kubectl-debug
- Telepresence
- Ksync
- Squash
- werf
- DevSpace
- Skaffold
- Garden
bit.ly/2shZpSc
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A collection of more than 20 kubectl CLI tips from the community
➜ learncloudnative.com/blog/20…
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Whenever you remove a pod from Kubernetes, what does it do to prevent outside traffic from entering the dying pod?
How does the pod internally sense that it is about to be removed and perform a graceful shutdown?
Discover the answers in this article
➜ medium.com/@meng.yan/what-ha…
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What are Linux namespaces and cgroups, and how do they work?
Read more nginx.com/blog/what-are-name…
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What happens when you create a Pod in Kubernetes?
A surprisingly simple task reveals a complicated workflow that touches several components in the cluster
Learn more in this article
➤ itnext.io/what-happens-when-…
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This repository contains a collection of scripts for various tasks in Kubernetes:
1. Loop over all namespaces in a cluster and find empty ones
2. Get a pod's cpu and memory usage
3. Get all pods that have restarts detected in one or more containers
4. ..
bit.ly/3m2ePS4
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🤔 Should you run a Kubernetes cluster with many smaller instances or a few larger ones?
This article explores the pros/cons:
📊 Resource allocations
📝 Optimal node capacity
⚖️ Scaling considerations
🌊 Bandwidth implications
♻️ IP recycling
📦 Storage
learnk8s.io/kubernetes-node-…
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Docker included a new command called `docker scan` that scans local images against the Snyk security engine, providing you with security visibility into your local Dockerfiles and images.
Read on: bit.ly/3pOAcI5
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If you are serious about learning Kubernetes, you should focus on in-depth tutorials and practical use cases. It’s not hard to find beginner contents about Kubernetes. Here you can find 35 advanced tutorials to learn Kubernetes
bit.ly/2SniRYf
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Popeye is a Kubernetes cluster resource sanitizer.
It's a read-only app that detect unused resources, misconfigurations, etc. bit.ly/2tFvzb0
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Top 20 Dockerfile best practices
Read more sysdig.com/blog/dockerfile-b…
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10 most common mistakes when using Kubernetes
- resources - requests and limits
- liveness and readiness probes
- LoadBalancer for every http service
- non-kubernetes-aware cluster autoscaling
- self anti-affinities for pods
bit.ly/3jqAAtl
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Kubectl cheat sheet for Kubernetes admins & CKA exam prep
→ computingforgeeks.com/kubect…
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What is the difference between a Docker Container and a Kubernetes Pod?
Can a Pod be created with plain Docker commands?
How are Pods implemented under the hood?
Find the answers in this article
➤ iximiuz.com/en/posts/contain…
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Comparing global Load Balancer approaches in Kubernetes for multi cluster setups: DNS vs Anycast
Read on: cloud.redhat.com/blog/global…
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In this article you'll break the cluster, delete certificates and rejoin the nodes without causing any downtime.
Read on itnext.io/breaking-down-and-…
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Kubernetes Certified Administration is a repository that contains online resources that will help you prepare for taking the Kubernetes Certified Administrator Certification exam
➜ github.com/walidshaari/Kuber…
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Two cheatsheets for Kubernetes (tested on 1.13), one in English, and one in French. It will give you some useful commands using kubectl, kubectx, kubens, kubetail, … and also some manifest samples for Ingress and PersistentVolumeClaim. bit.ly/2ZnlQBC
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In this article, you will cover the 6 most critical metrics based on Kubernetes's metadata that form a good baseline for monitoring your workloads and ensuring they're in a healthy state
➜ betterprogramming.pub/6-metr…
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47 things that you should know to be a Kubernetes experts (questions + answers)
→ ymmt2005.hatenablog.com/entr…
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A collection of excellent Kubernetes tutorials from DigitalOcean, Google Kubernetes Engine tutorials, Microsoft AKS tutorials, IBM Cloud Kubernetes Service Tutorials, AWS EKS Guides and Tutorials and more
bit.ly/2FG988k
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What happens when you boot up a Pod? What happens to a Service before it is allocated a public IP address? How often is a Deployment’s status changing?
kubespy is a small tool that makes it easy to observe how Kubernetes resources change in realtime
bit.ly/2XpSMc1
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Kepler (Kubernetes Efficient Power Level Exporter) uses eBPF to probe energy-related system stats and exports as Prometheus metrics
➤ github.com/sustainable-compu…
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What is the difference between a Docker Container and a Kubernetes Pod?
Can a Pod be created with plain Docker commands?
How are Pods implemented under the hood?
Find the answers in this article
➜ iximiuz.com/en/posts/contain…
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If you're investigating Ingress controllers for Kubernetes, you might be pleased to know that we expanded the Ingress controller comparison sheet!
+ HAProxy official Ingress controller
+ Added Avi Ingress controller
Check out the full comparison here: docs.google.com/spreadsheets…
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In this post, you will learn how the kubectl exec command works by examing the code of kubectl, the K8s API Server, Kubelet and CRI Docker API
bit.ly/2GYgUv3
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In this handbook you'll cover:
- What Does Istio Do?
- Introduction to Istio
- Istio's Architecture
- How to Use Istio in Practice
- How to Run the Services on the mesh
- Ingress Gateway
- Observability
- Traffic Management
- Istio Security
➜ freecodecamp.org/news/learn-…
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vk8s is a project that lets you set up a virtual Kubernetes cluster inside a Docker container for integration testing
➜ github.com/go-tk/vk8s
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Deckhouse is an Open Source platform for managing Kubernetes clusters. It supplies all the add-ons you need for auto-scaling, observability, security, and service mesh.
More github.com/deckhouse/deckhou…
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In this repository, you will find the resources to study for the CKA exam
You'll also learn more about Kubernetes concepts that are not in the exam, such as EKS, operators, Helm, Prometheus, and how to install and set up a cluster from scratch
➤ github.com/alifiroozi80/CKA
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The AWS team released the ACK project, which allows users to create AWS services from within a Kubernetes cluster
In this tutorial, you will learn how to create an S3 bucket with a "Bucket" CRD
awstip.com/manage-aws-servic…
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Recommendations, findings and learnings from running a 100TB+ Elasticsearch Logstash Kibana (ELK) stack running on Amazon Elastic Kubernetes Service (EKS) over 2.5 years
➜ medium.com/@siddharth.j.tela…
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Prometheus Cheat Sheet - How to Join Multiple Metrics (Vector Matching)
Read on: iximiuz.com/en/posts/prometh…
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Breaking Down Containers — in this article you will learn in-depth how containers work bit.ly/37cnmJG
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Kubeform is a Kubernetes operator for Terraform. Kubeform provides auto-generated Kubernetes CRDs for Terraform resources and modules so that you can manage any cloud infrastructure in a Kubernetes native way bit.ly/2OovccR
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Open Source solutions for chaos engineering in Kubernetes:
- kube-monkey
- chaoskube
- Chaos Mesh
- Litmus Chaos
- Chaos Toolkit
- KubeInvaders
Read more blog.flant.com/chaos-enginee…
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The state of persistent storage in Kubernetes — a benchmark
Longhorn vs OpenEBS vs StorageOS vs Piraeus
bit.ly/37Ar9lA
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Practice for th CKAD exam with these 150 questions bit.ly/2Xtmi0l
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In this blog post, you will delve into the essentials of network traffic within Kubernetes clusters, explore tools and techniques for packet capturing, and unearth best practices to ensure our efforts are efficient and safe
➜ jysk.tech/inspect-deployment…
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This repository contains a modern set of Grafana dashboards for Kubernetes
➤ ku.bz/408QCTLSW
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Troubleshooting in Kubernetes can be a daunting task. In this article, you will learn how to diagnose issues in Pods, Services and Ingress
➜ learnk8s.io/troubleshooting-…
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What's the best instance type for your Kubernetes cluster if your pods consume 4GB of memory and 0.5 vCPU?
- AWS: r6g.12xlarge
- GCP: e2-highmem-16
- Azure: E48a v4
Check out the updated Kubernetes instance calculator!
👉 learnk8s.io/kubernetes-insta…
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ctop provides a concise and condensed overview of real-time metrics for multiple containers
More github.com/bcicen/ctop
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In this guide, you will learn how to build a cluster network from scratch and ensure that all pods are assigned an IP address and can communicate with each other
➜ itnext.io/steps-to-emulate-p…
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In this article, you'll learn:
- What happens when you run a pod without setting a memory limit in Kubernetes?
- How does the Linux kernel apply requests to the container process?
- What happens when you exceed CPU or memory limits?
➜ blog.devops.dev/understandin…
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Kubernetes cluster networking can be more than a bit confusing. In this article you will follow the journey of an HTTP request to a service running on a basic Kubernetes cluster bit.ly/32YVcAZ
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An introduction into the complexities of Kubernetes networking. You will follow the journey of an HTTP request to a service running on a basic Kubernetes cluster bit.ly/37Qrujx
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An excellent (and detailed) presentation on how to code Kubernetes controllers
bit.ly/2LaXbL0
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In Kubernetes, what should I use as CPU requests and limits?
Popular answers include:
- Always use limits!
- NEVER use limits, only requests!
- I don't use either; is it OK?
This article explores the answers
➜ community.ops.io/danielepole…
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