https://lintech.uk/Recent content on Richard LinternHugo -- gohugo.ioen-GBCopyright © 2026 Richard LinternTue, 08 Sep 2026 19:23:00 +0100https://lintech.uk/projects/lintech-local-ai-platform/Tue, 08 Sep 2026 09:00:00 +0100https://lintech.uk/projects/lintech-local-ai-platform/Building a local-first AI platform that begins with a proven open model while establishing the data, architecture, training and evaluation foundations for an original Lintech language model.https://lintech.uk/lab-notes/gitops/application-onboarding/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/gitops/application-onboarding/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Plan, render, validate and reconcile a Kubernetes application through Flux GitOps.</p>https://lintech.uk/lab-notes/windows/bitlocker-status-protection/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/bitlocker-status-protection/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Read-only checks for encryption, protection, TPM and protector state. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/bitlocker-suspension-investigation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/bitlocker-suspension-investigation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for identifying why BitLocker protection is off or suspended and whether maintenance caused it. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/networking/connectivity-port-testing/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/networking/connectivity-port-testing/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Separate DNS, route, TCP, TLS and application-layer connectivity faults.</p>https://lintech.uk/lab-notes/windows/defender-endpoint-sensor-health/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/defender-endpoint-sensor-health/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Check Defender for Endpoint sensor services, onboarding indicators and relevant event channels. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/networking/dhcp-client-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/networking/dhcp-client-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for address assignment, lease, gateway, DNS options and conflict symptoms. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/dism-sfc-repair/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/dism-sfc-repair/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for checking and repairing the Windows component store and protected system files. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/networking/dns-exposure-management/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/networking/dns-exposure-management/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Plan and validate internal DNS, public DNS, ingress and protected service exposure.</p>https://lintech.uk/lab-notes/networking/dns-resolution-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/networking/dns-resolution-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Cross-platform workflow for resolver, record, cache, suffix and upstream DNS faults. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/entra-device-registration/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/entra-device-registration/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Interpret core dsregcmd device join, registration, SSO and MDM indicators. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/microsoft-365/entra-user-group-checks/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/microsoft-365/entra-user-group-checks/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Read-only Microsoft Graph checks for users, groups, licenses and membership. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/microsoft-365/exchange-online-connections/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/microsoft-365/exchange-online-connections/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Install, connect, verify and disconnect Exchange Online PowerShell safely. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/microsoft-365/exchange-recipient-investigation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/microsoft-365/exchange-recipient-investigation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Read-only checks for mailbox type, aliases, forwarding, permissions and delivery settings. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/gitops/flux-controller-health/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/gitops/flux-controller-health/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Basic controller health check: approximately 5 to 10 minutes</li> <li>Source or reconciliation investigation: approximately 15 to 30 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Use this entry when Flux resources are not reconciling, a source is stale, or one of the controllers appears unhealthy.</p>https://lintech.uk/lab-notes/gitops/kustomization-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/gitops/kustomization-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial Kustomization checks: approximately 5 to 10 minutes</li> <li>Build or dependency investigation: approximately 15 to 30 minutes</li> <li>Render, dry-run and reconciliation validation: approximately 20 to 45 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Use this entry when a Flux Kustomization is not ready, reports a build failure, waits on a dependency, or applies an unexpected revision.</p>https://lintech.uk/lab-notes/gitops/flux-reconciliation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/gitops/flux-reconciliation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Basic Flux health check: approximately 5 to 10 minutes</li> <li>Failed reconciliation investigation: approximately 10 to 30 minutes</li> <li>Render, dry-run, reconciliation and validation: approximately 15 to 45 minutes</li> </ul> <p>The actual duration depends on repository size, deployment dependencies, controller health and the cause of any reconciliation failure.</p>https://lintech.uk/lab-notes/gitops/gitops-drift-investigation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/gitops/gitops-drift-investigation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Compare Git, Flux revisions and live Kubernetes resources when desired and actual state differ.</p>https://lintech.uk/lab-notes/gitops/gitops-repository-structure/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/gitops/gitops-repository-structure/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Repository orientation: approximately 5 to 10 minutes</li> <li>Planning a new component: approximately 15 to 30 minutes</li> <li>Reviewing an existing layout: approximately 20 to 45 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>This entry describes a practical GitOps repository structure that separates desired state, cluster registration, operational documentation and historical evidence.</p>https://lintech.uk/lab-notes/monitoring/grafana-data-source-validation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/monitoring/grafana-data-source-validation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Validate Grafana workload health and connectivity to Prometheus and Loki data sources.</p>https://lintech.uk/lab-notes/windows/group-policy-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/group-policy-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Capture applied computer and user policy and investigate processing failures. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/microsoft-365/intune-device-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/microsoft-365/intune-device-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for enrollment, compliance, sync, ownership and managed-device investigation. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/virtualisation/backup-restore-operations/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/virtualisation/backup-restore-operations/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Review layered recovery using Git, etcd, Longhorn and application-aware backups.</p>https://lintech.uk/lab-notes/kubernetes/node-health-resource-pressure/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/kubernetes/node-health-resource-pressure/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial node triage: approximately 5 to 10 minutes</li> <li>Resource-pressure investigation: approximately 15 to 30 minutes</li> <li>Host-level investigation: approximately 20 to 45 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Use this entry when a node is <code>NotReady</code>, workloads cannot schedule, resource pressure is suspected, or platform capacity needs review.</p>https://lintech.uk/lab-notes/kubernetes/persistent-volume-checks/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/kubernetes/persistent-volume-checks/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Investigate PersistentVolumes, claims, storage classes, attachments and mount failures.</p>https://lintech.uk/lab-notes/kubernetes/pod-workload-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/kubernetes/pod-workload-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial pod triage: approximately 5 to 10 minutes</li> <li>Restart or scheduling investigation: approximately 15 to 30 minutes</li> <li>Dependency or storage investigation: approximately 30 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Use this entry to investigate pods in <code>Pending</code>, <code>Failed</code>, <code>Unknown</code>, <code>CrashLoopBackOff</code>, <code>ImagePullBackOff</code> or repeated restart states.</p>https://lintech.uk/lab-notes/kubernetes/resource-requests-limits/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/kubernetes/resource-requests-limits/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Review Kubernetes CPU and memory requests, limits, live usage and scheduling impact.</p>https://lintech.uk/lab-notes/gitops/render-dry-run-validation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/gitops/render-dry-run-validation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Validate desired-state manifests locally and against the Kubernetes API without persisting changes.</p>https://lintech.uk/lab-notes/linux/linux-command-quick-reference/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/linux/linux-command-quick-reference/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Quick reference for files, processes, storage, services, networking, users and logs. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/linux/disk-filesystem-management/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/linux/disk-filesystem-management/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Read-only checks for devices, filesystems, mounts, capacity, inodes and high-usage paths. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/linux/linux-network-dns/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/linux/linux-network-dns/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for links, addressing, routes, resolvers, DNS and TCP connectivity. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/linux/linux-system-health/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/linux/linux-system-health/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Review uptime, CPU, memory, storage, services, logs and network state on Linux.</p>https://lintech.uk/lab-notes/monitoring/loki-promtail-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/monitoring/loki-promtail-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Investigate missing logs, ingestion failures, DaemonSet coverage and Loki readiness.</p>https://lintech.uk/lab-notes/monitoring/longhorn-metrics-validation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/monitoring/longhorn-metrics-validation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Validate Longhorn ServiceMonitor discovery and storage dashboard data.</p>https://lintech.uk/lab-notes/virtualisation/longhorn-snapshot-backup-checks/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/virtualisation/longhorn-snapshot-backup-checks/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Confirm Longhorn recurring jobs, snapshots, backups and backup-target health.</p>https://lintech.uk/lab-notes/kubernetes/longhorn-storage-health/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/kubernetes/longhorn-storage-health/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Check Longhorn workloads, volumes, replicas, nodes, capacity and warning events.</p>https://lintech.uk/lab-notes/macos/macos-logs-diagnostics/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/macos/macos-logs-diagnostics/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Use unified logging and Apple Diagnostics to investigate software and hardware faults. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/macos/macos-network-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/macos/macos-network-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for interfaces, services, routes, DNS, Wi-Fi and TCP connectivity. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/macos/macos-support-command-reference/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/macos/macos-support-command-reference/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Quick reference for macOS system, disk, network, process, update and log checks. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/macos/macos-system-health/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/macos/macos-system-health/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Read-only checks for platform version, hardware, storage, uptime, processes and updates. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/microsoft-365/mail-flow-message-trace/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/microsoft-365/mail-flow-message-trace/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for investigating delayed, rejected or missing Exchange Online messages. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/microsoft-365/mailbox-permissions-delegation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/microsoft-365/mailbox-permissions-delegation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Review Full Access, Send As, Send on Behalf and shared mailbox delegation. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/microsoft-365/service-health-checks/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/microsoft-365/service-health-checks/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Review tenant service health, advisories and workload-specific diagnostics. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/defender-health-updates/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/defender-health-updates/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Check Microsoft Defender Antivirus health, versions, services and security intelligence freshness. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/microsoft-365/defender-initial-investigation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/microsoft-365/defender-initial-investigation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>A read-only first workflow for triaging Microsoft Defender alerts and affected entities. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/defender-scan-detection/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/defender-scan-detection/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Run controlled scans and review Defender threats and detections. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/monitoring/prometheus-target-health/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/monitoring/prometheus-target-health/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Investigate Prometheus targets, ServiceMonitor discovery and scrape configuration.</p>https://lintech.uk/lab-notes/security/alert-severity-classification/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/security/alert-severity-classification/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Classify informational, low, medium, high and critical alerts consistently.</p>https://lintech.uk/lab-notes/security/security-incident-triage/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/security/security-incident-triage/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Validate alerts, establish scope, classify severity and preserve investigation evidence.</p>https://lintech.uk/lab-notes/gitops/sops-age-workflow/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/gitops/sops-age-workflow/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Validate an existing encrypted Secret: approximately 5 to 10 minutes</li> <li>Create and reconcile a new encrypted Secret: approximately 15 to 30 minutes</li> <li>Investigate a decryption fault: approximately 20 to 45 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>This entry describes a safe workflow for storing encrypted Kubernetes Secret manifests in Git using SOPS and age, with Flux performing decryption during reconciliation.</p>https://lintech.uk/lab-notes/linux/ssh-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/linux/ssh-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for name resolution, reachability, host keys, authentication and server logs. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/linux/systemd-service-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/linux/systemd-service-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Investigate failed or unhealthy Linux services using systemctl and Journald.</p>https://lintech.uk/lab-notes/networking/unifi-client-connectivity/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/networking/unifi-client-connectivity/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Support workflow for association, VLAN, lease, DNS, roaming and access problems. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/networking/unifi-dhcp-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/networking/unifi-dhcp-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Investigate UniFi network DHCP scopes, leases, gateway and DNS options. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/networking/vpn-connectivity-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/networking/vpn-connectivity-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for client state, DNS, routes, policy, authentication and service reachability. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/security/wazuh-agent-onboarding/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/security/wazuh-agent-onboarding/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Pilot, enroll, group and validate a Wazuh endpoint agent using a controlled rollout.</p>https://lintech.uk/lab-notes/security/wazuh-agent-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/security/wazuh-agent-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Investigate Wazuh agent service state, connectivity, enrollment and telemetry flow.</p>https://lintech.uk/lab-notes/security/wazuh-rule-validation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/security/wazuh-rule-validation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Test custom Wazuh rules, record evidence and tune detections safely.</p>https://lintech.uk/lab-notes/networking/wifi-connectivity-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/networking/wifi-connectivity-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for signal, association, DHCP, DNS, gateway and internet access. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/disk-space-cleanup/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/disk-space-cleanup/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Investigate low disk capacity and apply controlled cleanup actions. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/event-log-investigation/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/event-log-investigation/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>PowerShell and command-line techniques for filtering and exporting relevant Windows events. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/windows-initial-health-checks/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/windows-initial-health-checks/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Read-only first checks for operating system, uptime, storage, services, reliability and recent faults. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/windows-network-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/windows-network-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for adapter, address, DNS, route, proxy and TCP connectivity faults. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/power-battery-diagnostics/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/power-battery-diagnostics/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Check battery health, sleep blockers, wake sources and power configuration. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/windows-services-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/windows-services-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Investigate stopped, failing or misconfigured Windows services. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/windows-support-command-reference/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/windows-support-command-reference/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Quick reference for common Windows support, identity, networking, service and system checks. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/lab-notes/windows/windows-update-troubleshooting/Mon, 31 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/windows/windows-update-troubleshooting/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial checks: approximately 10 to 20 minutes</li> <li>Detailed investigation: approximately 20 to 60 minutes</li> </ul> </blockquote> <h2 class="relative group">Purpose <div id="purpose" class="anchor"></div> <span class="absolute top-0 w-6 transition-opacity opacity-0 -start-6 not-prose group-hover:opacity-100 select-none"> <a class="text-primary-300 dark:text-neutral-700 !no-underline" href="#purpose" aria-label="Anchor">#</a> </span> </h2> <p>Workflow for update history, services, policy, logs, pending reboots and component repair. This public reference consolidates professional support experience developed since March 2022 and uses generic placeholders rather than employer or customer information.</p>https://lintech.uk/projects/runbook-knowledge-platform/Sun, 30 Aug 2026 09:00:00 +0100https://lintech.uk/projects/runbook-knowledge-platform/A searchable Hugo and Git documentation platform containing 78 runbooks across ten categories and eight evidence-backed project case studies.https://lintech.uk/lab-notes/kubernetes/cluster-health-checks/Sun, 30 Aug 2026 00:00:00 +0000https://lintech.uk/lab-notes/kubernetes/cluster-health-checks/<blockquote><p><strong>Time guide</strong></p> <ul> <li>Initial cluster triage: approximately 10 to 20 minutes</li> <li>Standard health review: approximately 30 minutes</li> <li>Full platform, storage and host review: approximately 30 to 60 minutes</li> </ul> <p>The actual duration depends on cluster size, access availability and whether any checks identify faults that need further investigation.</p>https://lintech.uk/projects/cloudflare-edge-hardening/Fri, 28 Aug 2026 09:00:00 +0100https://lintech.uk/projects/cloudflare-edge-hardening/A tunnel-based public access design with two cloudflared replicas, selective edge controls and CrowdSec-informed enforcement.https://lintech.uk/projects/security-monitoring-platform/Wed, 26 Aug 2026 09:00:00 +0100https://lintech.uk/projects/security-monitoring-platform/A detection and investigation platform combining Wazuh, Microsoft 365 audit data, CrowdSec, MISP and a least-privilege SOC portal.https://lintech.uk/projects/observability-platform/Mon, 24 Aug 2026 09:00:00 +0100https://lintech.uk/projects/observability-platform/A website-like internal operations portal that unifies live telemetry from eleven validated APIs without replacing authoritative tools.https://lintech.uk/projects/longhorn-storage-recovery/Fri, 21 Aug 2026 09:00:00 +0100https://lintech.uk/projects/longhorn-storage-recovery/A layered recovery system combining Longhorn replication, daily snapshots, weekly QNAP backups and Veeam tape archival.https://lintech.uk/projects/sops-age-secret-management/Tue, 18 Aug 2026 09:00:00 +0100https://lintech.uk/projects/sops-age-secret-management/Encryption and recovery controls for 31 Git-managed Kubernetes Secret manifests using SOPS, age and Flux.https://lintech.uk/projects/flux-gitops-platform/Sun, 09 Aug 2026 09:00:00 +0100https://lintech.uk/projects/flux-gitops-platform/A declarative delivery system using Flux, Kustomize, Helm, image automation and encrypted Git-managed secrets.https://lintech.uk/projects/k3s-cluster/Sun, 12 Jul 2026 09:00:00 +0100https://lintech.uk/projects/k3s-cluster/A power-efficient, highly available four-node Kubernetes platform built with Raspberry Pi 5 hardware, k3s, Longhorn and GitOps.