updated docs;

Author: naman-msft

scenarios/azure-management-docs/articles/azure-linux/quickstart-azure-cli.md

@@ -65,8 +65,13 @@ Create an AKS cluster using the `az aks create` command with the `--os-sku` para
 
 ```azurecli-interactive
 export MY_AZ_CLUSTER_NAME="myAzureLinuxCluster$RANDOM_ID"
+clusterExists=$(az aks show --name $MY_AZ_CLUSTER_NAME --resource-group $MY_RESOURCE_GROUP_NAME --query name --output tsv 2>/dev/null)
 
-az aks create --name $MY_AZ_CLUSTER_NAME --resource-group $MY_RESOURCE_GROUP_NAME --os-sku AzureLinux
+if [ -z "$clusterExists" ]; then
+  az aks create --name $MY_AZ_CLUSTER_NAME --resource-group $MY_RESOURCE_GROUP_NAME --os-sku AzureLinux
+else
+  echo "AKS cluster '$MY_AZ_CLUSTER_NAME' already exists. Skipping creation."
+fi
 ```
 
 After a few minutes, the command completes and returns JSON-formatted information about the cluster.