diff --git a/Nlbench_beta.sh b/Nlbench_beta.sh
index 0b3a132..b095289 100644
--- a/Nlbench_beta.sh
+++ b/Nlbench_beta.sh
@@ -28,60 +28,29 @@ if [ "$(id -u)" != "0" ]; then
     echo "已获取 sudo 权限。"
 fi
 
-# 检查 root 权限并获取 sudo 权限
-if [ "$(id -u)" != "0" ]; then
-    echo "此脚本需要 root 权限运行。"
-    if ! sudo -v; then
-        echo "无法获取 sudo 权限，退出脚本。"
-        exit 1
-    fi
-    echo "已获取 sudo 权限。"
-fi
-
 # 更新系统并安装依赖
 install_dependencies() {
-    echo -e "${YELLOW}正在更新系统并安装必要的依赖项...${NC}"
-    
-    local package_manager
-    local update_cmd
-    local install_cmd
-    
-    if command -v apt &>/dev/null; then
-        package_manager="apt-get"
-        update_cmd="update"
-        install_cmd="install -y"
-    elif command -v dnf &>/dev/null; then
-        package_manager="dnf"
-        update_cmd="check-update"
-        install_cmd="install -y"
-    elif command -v yum &>/dev/null; then
-        package_manager="yum"
-        update_cmd="check-update"
-        install_cmd="install -y"
-    elif command -v apk &>/dev/null; then
-        package_manager="apk"
-        update_cmd="update"
-        install_cmd="add"
-    else
-        echo -e "${RED}不支持的Linux发行版${NC}"
-        return 1
-    fi
+    echo -e "${YELLOW}正在检查并安装必要的依赖项...${NC}"
     
     # 更新系统
-    if sudo $package_manager $update_cmd; then
+    echo -e "${YELLOW}正在更新系统...${NC}"
+    if update_system; then
         echo -e "${GREEN}系统更新完成。${NC}"
-        [ "$package_manager" != "apk" ] && sudo $package_manager upgrade -y
     else
         echo -e "${RED}系统更新失败。继续安装依赖项。${NC}"
     fi
     
     # 安装依赖
-    local dependencies=("curl" "wget" "iperf3")
+    local dependencies=(
+        "curl"
+        "wget"
+        "iperf3"
+    )
     
     for dep in "${dependencies[@]}"; do
         if ! command -v "$dep" &> /dev/null; then
             echo -e "${YELLOW}正在安装 $dep...${NC}"
-            if ! sudo $package_manager $install_cmd "$dep"; then
+            if ! install_package "$dep"; then
                 echo -e "${RED}无法安装 $dep。请手动安装此依赖项。${NC}"
             fi
         else
@@ -93,6 +62,41 @@ install_dependencies() {
     clear
 }
 
+# 更新系统
+update_system() {
+    if command -v apt &>/dev/null; then
+        sudo apt-get update && sudo apt-get upgrade -y
+    elif command -v dnf &>/dev/null; then
+        sudo dnf check-update && sudo dnf upgrade -y
+    elif command -v yum &>/dev/null; then
+        sudo yum check-update && sudo yum upgrade -y
+    elif command -v apk &>/dev/null; then
+        sudo apk update && sudo apk upgrade
+    else
+        echo -e "${RED}不支持的Linux发行版${NC}"
+        return 1
+    fi
+    return 0
+}
+
+# 安装包
+install_package() {
+    local package=$1
+    if command -v apt &>/dev/null; then
+        sudo apt-get install -y "$package"
+    elif command -v dnf &>/dev/null; then
+        sudo dnf install -y "$package"
+    elif command -v yum &>/dev/null; then
+        sudo yum install -y "$package"
+    elif command -v apk &>/dev/null; then
+        sudo apk add "$package"
+    else
+        echo -e "${RED}不支持的Linux发行版${NC}"
+        return 1
+    fi
+    return 0
+}
+
 # 获取IP地址和ISP信息
 ip_address_and_isp() {
     ipv4_address=$(curl -s --max-time 5 ipv4.ip.sb)