我正在升级我的 Ubuntu，但升级停止了，并显示以下消息。
The GRUB boot loader was previously installed to a disk that is no longer present, or whose unique identifier has changed for some reason. It is important to make sure that the installed GRUB core image stays in sync with GRUB modules and grub.cfg. Please check.
我不知道如何检查这个。这台电脑是我姐姐给我的。
答案1
使用Space在选项之间切换（应该是/dev/sda）。然后按Enter。