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Incident problems and guides grouped by certification, symptom, vendor, and topic. Only hubs with recommended problems (reviewed or with detailed scenarios) are listed.

Certifications9

CKA41 recommendedAWS Solutions Architect Associate34 recommended정보처리기사33 recommendedAWS DevOps Engineer Professional32 recommendedRHCSA32 recommendedCCNA30 recommendedCompTIA Security+28 recommended정보보안기사17 recommendedCCNP Enterprise9 recommended

Symptoms11

Resource Exhaustion23 recommended정보처리기사 실기20 recommendedPermission Denied19 recommended404 and Rewrite Mismatch19 recommendedRollout Stuck17 recommendedAuth and Session Failure15 recommendedTimeouts and Latency13 recommendedCrashLoop and Restarts10 recommendedCertificate Trust Failure8 recommendedDNS Resolution Failure6 recommendedRoute or Adjacency Loss4 recommended

Vendors15

GitHub20 recommendedNGINX12 recommendedAWS11 recommendedAzure6 recommendedCisco5 recommendedKubernetes4 recommendedLinux4 recommendedCloudflare2 recommendedDocker1 recommendedJuniper1 recommendedHashiCorp1 recommendedIdentity1 recommendedPrometheus1 recommendedGoogle1 recommendedBIND1 recommended

Topics58

Kubernetes

Kubernetes Config and Rollouts15 recommendedKubernetes Scheduling and Capacity8 recommendedKubernetes Ingress and Traffic6 recommendedService Discovery4 recommendedKubernetes Workload Reliability3 recommendedContainer Startup2 recommendedObservability Pipeline1 recommendedCluster Maintenance1 recommendedDNS1 recommendedCluster Networking and Service Discovery1 recommendedHealth Probes1 recommendedIngress HTTP Routing1 recommendedPersistent Storage1 recommendedStateful Workload Ops1 recommended

Linux

정보처리기사 실기 기출20 recommendedLinux Service Operations12 recommendedLinux Permissions and Access5 recommendedLinux Storage and Filesystems4 recommendedLinux Performance and Observability2 recommendedResource Management2 recommendedRuntime Configuration1 recommendedService Ops1 recommendedFile Permissions1 recommendedLinux Identity and Access1 recommendedRemote Access1 recommendedScheduled Jobs1 recommended

CI/CD

GitHub Actions Workflows14 recommendedRollback and Rollout6 recommendedContainer Image Delivery6 recommendedCI/CD Release Safety3 recommendedArtifact Promotion2 recommendedDeployment Governance2 recommendedCI/CD Workflow Debugging2 recommendedRepository Access2 recommendedWorkflow Status Checks1 recommendedRunner Hygiene1 recommendedBuild Cache Hygiene1 recommended

Network

DNS and Routing13 recommendedFirewall and Proxy Paths7 recommendedNetwork Services And Operations6 recommendedRouting And Failover Paths2 recommendedSwitching And Vlan Design1 recommendedFirewall Policy Basics1 recommendedDNS Resolution1 recommendedResponse Time Analysis1 recommendedProxy Header Forwarding1 recommended

Security

Identity and Access Management6 recommendedIdentity And Access5 recommendedTLS and Certificate Chain5 recommendedWAF and AppSec Controls4 recommendedReverse Proxy Security1 recommendedAccess Control1 recommendedIncident Response Operations1 recommendedCloud Security and Governance1 recommendedCertificate Chain And Trust1 recommendedToken Validation1 recommendedSecret Management1 recommendedOIDC Federation1 recommended