文档更新

docs/help/index.md

@@ -29,6 +29,12 @@ hide:
         zypper install curl
         ```
 
+    === "Arch Linux"
+
+        ``` sh
+        pacman -S curl
+        ```
+
 ## 还原已备份的软件源
 
 === "Debian 系 Linux"
@@ -56,6 +62,13 @@ hide:
     zypper ref
     ```
 
+=== "Arch Linux"
+
+    ``` sh
+    cp -rvf /etc/pacman.d/mirrorlist.bak /etc/pacman.d/mirrorlist
+    pacman -Sy
+    ```
+
 ## 其它
 
   - 如果提示 `bash: /proc/self/fd/11: No such file or directory`，请切换至 `Root` 用户执行，切换命令为 `su root`