如图，直接被进入紧急模式

下载ubuntu镜像或其他livecd进入桌面环境 sudo blkid

然后发现，sda1是efi,sda2是根分区

开始挂载redhat目录并修补initramfs

挂载EFI

sudo mkdir -p /mnt/rhel/boot/efi

sudo mount /dev/sda1 /mnt/rhel/boot/efi

挂载redhat分区

sudo mkdir /mnt/rhel

sudo mount /dev/sda2 /mnt/rhel

挂载 路径

for i in /dev /proc /sys /run; do sudo mount -B $i /mnt/rhel$i; done

进入redhat环境 sudo chroot /mnt/rhel

查看Redhat内核 ls /lib/modules/

此次选用4.18.0-553.22.1.el8_10.x86_64 内核

KVER="4.18.0-553.22.1.el8_10.x86_64"

生成initramfs

dracut -f -v --add-drivers "hv_vmbus hv_storvsc hv_netvsc" /boot/initramfs-${KVER}.img ${KVER}

生成完毕如图

退出chroot exit

卸载挂载点

# 卸载系统虚拟文件系统
for i in /dev /proc /sys /run; do sudo umount /mnt/rhel$i; done

# 卸载 EFI 分区 (/dev/sda1)
sudo umount /mnt/rhel/boot/efi

# 卸载根分区 (/dev/sda2)
sudo umount /mnt/rhel

sudo reboot

开机grub选择内核为4.18.0-553.22.1.el8_10.x86_64的即可