feat(sysctl): 优化配置清理逻辑并增加参数有效性检测

1.sh

@@ -53,6 +53,7 @@ sysctl_config() {
 
   # 确定 sysctl 配置文件路径
   SYSCTL_CONF="/etc/sysctl.conf"
+  SYSCTL_CLEANUP_FILES=("/etc/sysctl.conf" "/etc/sysctl.d/99-sysctl.conf" "/etc/sysctl.d/999-custom.conf")
   if [ "$SYSTEM_TYPE" = "debian" ]; then
     DEBIAN_VERSION=$(grep -oP 'VERSION_ID="\K[^"]+' /etc/os-release 2>/dev/null || cat /etc/debian_version 2>/dev/null | cut -d. -f1)
 
@@ -85,7 +86,19 @@ sysctl_config() {
 
   for SETTING in "${SYSCTL_SETTINGS[@]}"; do      # 遍历数组
     KEY=$(echo "$SETTING" | cut -d '=' -f 1)      # 截取=左边的字符串
-    sed -i "/^$KEY *= *[0-9]*/d" "$SYSCTL_CONF"   # 删除已有的配置
+    KEY_PATH="/proc/sys/${KEY//./\/}"
+    if [ ! -e "$KEY_PATH" ]; then
+      print_yellow "跳过不支持的 sysctl: $KEY"
+      continue
+    fi
+
+    KEY_REGEX=${KEY//./\\.}
+    for CLEANUP_FILE in "${SYSCTL_CLEANUP_FILES[@]}"; do
+      if [ -f "$CLEANUP_FILE" ]; then
+        sed -i "/^[[:space:]]*${KEY_REGEX}[[:space:]]*=.*/d" "$CLEANUP_FILE"
+      fi
+    done
+
     echo "$SETTING" >>"$SYSCTL_CONF"              # 追加新的配置
     # echo "已添加系统配置: $SETTING"                # 输出提示信息
   done # 循环结束