Update node_exporter_install_v2

node_exporter_install_v2

@@ -123,4 +123,62 @@ curl -LO ${DOWNLOAD_URL}
 
 # Check if the download was successful
 if [ $? -ne 0 ]; then
-    echo "
+    echo "Error downloading Node Exporter. Please check the URL."
+    exit 1
+fi
+
+# Check if the downloaded file exists
+if [ ! -f "node_exporter-${LATEST_VERSION#v}.linux-amd64.tar.gz" ]; then
+    echo "Downloaded file does not exist."
+    exit 1
+fi
+
+# Extract node_exporter
+tar -xzf node_exporter-${LATEST_VERSION#v}.linux-amd64.tar.gz
+if [ $? -eq 0 ]; then
+    echo "Node Exporter extracted successfully."
+else
+    echo "Error extracting Node Exporter. Please check the downloaded file."
+    exit 1
+fi
+
+# Main menu loop
+while true; do
+    display_menu
+    read -p "Select an option [1-6]: " option
+
+    case $option in
+        1)
+            install_node_exporter
+            ;;
+        2)
+            create_service
+            ;;
+        3)
+            check_service_status
+            ;;
+        4)
+            cleanup_files
+            ;;
+        5)
+            install_node_exporter
+            create_service
+            check_service_status
+            read -p "Do you want to clean up the downloaded files? (y/n): " cleanup_choice
+            if [[ "$cleanup_choice" == "y" || "$cleanup_choice" == "Y" ]]; then
+                cleanup_files
+            else
+                echo "Downloaded files retained."
+            fi
+            ;;
+        6)
+            echo "Exiting."
+            exit 0
+            ;;
+        *)
+            echo "Invalid option. Please select a valid option."
+            ;;
+    esac
+done
+
+echo "Script execution completed."