diff --git a/das/src/main/java/com/das/modules/cache/service/CacheService.java b/das/src/main/java/com/das/modules/cache/service/CacheService.java
index 886f4c87..efffc4b6 100644
--- a/das/src/main/java/com/das/modules/cache/service/CacheService.java
+++ b/das/src/main/java/com/das/modules/cache/service/CacheService.java
@@ -9,6 +9,7 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Service;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.concurrent.ConcurrentHashMap;
 
@@ -42,7 +43,7 @@ public class CacheService {
     /**
      * 设备缓存信息
      */
-    private final List<DeviceInfoCache> deviceInfoCaches = new ArrayList<DeviceInfoCache>();
+    private final List<DeviceInfoCache> deviceInfoCaches = Collections.synchronizedList(new ArrayList<>());
 
     /**
      * 设备CODE索引，用于通过设备CODE访问设备缓存信息
@@ -115,5 +116,32 @@ public class CacheService {
         return null;
     }
 
+    /**
+     * 刷新指定设备ID的设备缓存，如果缓存不存在则添加。
+     * @param deviceId
+     */
+    public void refreshDeviceCache(Long deviceId) {
+        SysEquipment equipment = sysEquipmentMapper.selectById(deviceId);
+        if (equipment != null) {
+            DeviceInfoCache deviceInfoCache = new DeviceInfoCache();
+            deviceInfoCache.setDeviceId(equipment.getId());
+            deviceInfoCache.setDeviceCode(equipment.getCode());
+            deviceInfoCache.setDeviceName(equipment.getName());
+            deviceInfoCache.setObjectType(equipment.getObjectType());
+            deviceInfoCache.setParentDeviceId(equipment.getParentEquipmentId());
+            //如果是已经缓存过的设备直接缓存
+            Integer index = deviceIdIndex.get(deviceId);
+            if (index != null) {
+                deviceInfoCaches.set(index, deviceInfoCache);
+            }
+            else{
+                deviceInfoCaches.add(deviceInfoCache);
+                index = deviceInfoCaches.size();
+                deviceCodeIndex.put(deviceInfoCache.getDeviceCode(),index);
+                deviceIdIndex.put(equipment.getId(),index);
+            }
+        }
+    }
+
     ///-设备缓存=END---------------------------------------------------------------
 }
diff --git a/docs/deploy/linux.md b/docs/deploy/linux.md
index d3c7a154..60ba4e0a 100644
--- a/docs/deploy/linux.md
+++ b/docs/deploy/linux.md
@@ -32,7 +32,7 @@ OpenEuler的安装和Centos差不多，这里不详细说明了，就把几个
 
 点击 `Done`完成分区配置。
 
-> `Lanage Support` 这个需要勾上中文。
+> `Language Support` 这个需要勾上中文。
 
 ![alt text](asserts/image-10.png)
 
@@ -48,4 +48,28 @@ OpenEuler的安装和Centos差不多，这里不详细说明了，就把几个
 
 ## 系统配置
 
-!> 未完待续
\ No newline at end of file
+### 更新系统(不能访问外网请忽略)
+
+```bash
+yum update -y
+```
+
+### 关闭Selinux
+除非你明确知道它是什么怎么配置，否则不建议开启。
+
+```bash
+setenforce 0
+```
+上面的命令是临时关闭，仅在当前Session下有效，使用它就不用重启了。
+ 永久关闭的命令:
+
+ ```bash
+ sed -i 's/SELINUX=enforcing/SELINUX=disabled/g' /etc/selinux/config
+ ```
+
+### 关闭防火墙
+
+```bash
+systemctl stop firewalld
+systemctl disable firewalld
+```
\ No newline at end of file