diff --git a/setup-nas-poweroff.sh b/setup-nas-poweroff.sh
index 3c4e42d..b7f1299 100644
--- a/setup-nas-poweroff.sh
+++ b/setup-nas-poweroff.sh
@@ -19,8 +19,22 @@ if [ -z "$SYSTEMCTL_PATH" ]; then
   exit 1
 fi
 
+# 自动检测可写家目录
+TEST_DIR="$HOME"
+if [ ! -w "$TEST_DIR" ]; then
+    echo "⚠ 当前 \$HOME ($HOME) 不可写，尝试使用 /vol1/1000"
+    TEST_DIR="/vol1/1000"
+    if [ ! -w "$TEST_DIR" ]; then
+        echo "❌ 没有可写目录，请手动设置 NAS_HOME 变量"
+        exit 1
+    fi
+fi
+
+NAS_HOME="$TEST_DIR"
+
 echo "当前用户: $USER_NAME"
 echo "systemctl: $SYSTEMCTL_PATH"
+echo "将使用目录: $NAS_HOME"
 echo
 echo "将执行："
 echo "  - 初始化 ~/.ssh 权限"
@@ -30,15 +44,15 @@ read -p "是否继续？[y/N]: " CONFIRM
 [[ "$CONFIRM" =~ ^[Yy]$ ]] || exit 0
 
 # SSH 目录
-mkdir -p "$HOME/.ssh"
-chmod 700 "$HOME/.ssh"
-touch "$HOME/.ssh/authorized_keys"
-chmod 600 "$HOME/.ssh/authorized_keys"
+mkdir -p "$NAS_HOME/.ssh"
+chmod 700 "$NAS_HOME/.ssh"
+touch "$NAS_HOME/.ssh/authorized_keys"
+chmod 600 "$NAS_HOME/.ssh/authorized_keys"
 
 # sudo 规则
 SUDO_RULE="$USER_NAME ALL=(root) NOPASSWD:$SYSTEMCTL_PATH poweroff"
 
-if sudo grep -q "$SUDO_RULE" /etc/sudoers; then
+if sudo grep -qF "$SUDO_RULE" /etc/sudoers; then
   echo "✔ sudo 规则已存在"
 else
   echo "$SUDO_RULE" | sudo tee -a /etc/sudoers >/dev/null