什么是救援图像?

What is a rescue image?

我正在尝试从 osdev's wiki, but somewhere there it says that I have to use the grub-mkrescue command. I was doing some research around internet to understand what does that command do and found in the grub official documentation 这句话学习如何制作自己的 os:

The program grub-mkrescue generates a bootable GRUB rescue image

什么是救援图像?

救援映像可用于恢复您的计算机。这可用于创建您可以返回的还原点,或者作为备份以防您的硬盘损坏。它类似于用于创建 OS 的 ISO 映像。有关详细信息,请参阅 this article