update kuber doc: stroage

Containerization & Orchestration/Kubernetes/Storage/Longhorn/with-kubectl.md

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+# 📦 Deploying Longhorn with `kubectl`
+
+This guide walks you through installing **Longhorn**, a cloud-native distributed block storage solution for Kubernetes, using `kubectl`.
+
+---
+
+## 🚀 Prerequisites
+
+* A Kubernetes cluster (v1.21 or newer recommended)
+* `kubectl` configured and connected to your cluster
+* Internet access for downloading manifests
+
+---
+
+## 🧩 Step 1: Apply Longhorn YAML
+
+Apply the official Longhorn deployment manifest in the `longhorn-system` namespace:
+
+```bash
+kubectl apply -f https://raw.githubusercontent.com/longhorn/longhorn/v1.9.0/deploy/longhorn.yaml
+```
+
+This will create all required resources under the `longhorn-system` namespace.
+
+---
+
+## 🔍 Step 2: Monitor Longhorn Pods
+
+Watch the pods being created to ensure Longhorn is deploying properly:
+
+```bash
+kubectl get pods \
+--namespace longhorn-system \
+--watch
+```
+
+Wait until all pods show a `Running` or `Completed` status.
+
+---
+
+## 📦 Step 3: Verify Storage Classes
+
+Once Longhorn is running, verify that the storage classes have been registered:
+
+```bash
+kubectl get storageclasses
+```
+
+You should see a storage class named `longhorn`, which can now be used in your PersistentVolumeClaims (PVCs).
+
+---
+
+## ✅ Success!
+
+Longhorn is now successfully deployed and ready to provide persistent block storage for your workloads.
+
+For more information, visit the [official Longhorn documentation](https://longhorn.io/docs/).
+