diff --git a/command/grub2-mkconfig.md b/command/grub2-mkconfig.md
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+grub2-mkconfig
+===
+
+生成 grub.cfg 配置文件。
+
+## 语法
+
+```shell
+Usage: grub2-mkconfig [OPTION]
+Generate a grub config file
+
+  -o, --output=FILE       output generated config to FILE [default=stdout]
+  -h, --help              print this message and exit
+  -v, --version           print the version information and exit
+
+Report bugs to <bug-grub@gnu.org>.
+
+```
+
+## 实例
+
+生成新的grub配置文件
+
+```shell
+grub2-mkconfig -o /boot/grub2/grub.cfg
+
+# 或者
+
+grub2-mkconfig > /boot/grub2/grub.cfg
+```