diff --git a/scripts/install_pve.sh b/scripts/install_pve.sh
index 638234c..f5be420 100644
--- a/scripts/install_pve.sh
+++ b/scripts/install_pve.sh
@@ -624,6 +624,7 @@ install_package ipcalc
 install_package dmidecode
 install_package dnsutils
 install_package ethtool
+ethtool_path=$(which ethtool)
 check_haveged
 
 # 检测系统信息
@@ -987,9 +988,9 @@ fix_interfaces_ipv6_auto_type
 # 特殊处理Hetzner和Azure的情况
 if [[ $dmidecode_output == *"Hetzner_vServer"* ]] || [[ $dmidecode_output == *"Microsoft Corporation"* ]]; then
     auto_interface=$(grep '^auto ' /etc/network/interfaces | grep -v '^auto lo' | awk '{print $2}' | head -n 1)
-    if ! grep -q "^post-up /sbin/ethtool" /etc/network/interfaces; then
+    if ! grep -q "^post-up ${$ethtool_path}" /etc/network/interfaces; then
         chattr -i /etc/network/interfaces
-        echo "post-up /sbin/ethtool -K $auto_interface tx off rx off" >> /etc/network/interfaces
+        echo "post-up ${$ethtool_path} -K $auto_interface tx off rx off" >> /etc/network/interfaces
         chattr +i /etc/network/interfaces
     fi
 fi