doc: 备份文章；

01Petard · Dec 17, 2024 · b6963d3 · b6963d3
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commit b6963d3
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diff --git a/docs/硬件/树莓派折腾记录.md b/docs/硬件/树莓派折腾记录.md
@@ -73,6 +73,13 @@ mirrors.aliyun.com
 sudo apt-get update
 ```
 
+4、***（可选）升级系统版本***
+
+```shell
+sudo apt-get upgrade
+sudo rpi-update
+```
+
 # 正确显示中文
 
 ```shell