grub引导项丢失修复

grub rescue>ls (hd0,gpt1)
grub rescue>set root=(hd0,gpt1)
grub rescue>set prefix=(hd0,gpt1)/boot/grub
grub rescue>insmod normal
grub rescue>normal

grub >linux /vmlinuz-xxx-xxx root=/dev/sda1
grub >initrd /initrd.img-xxx-xxx
grub >boot

manjaro

grub >linux /boot/vmlinuz-xxx-xxx root=/dev/sda6
grub >initrd /boot/initramfs-xxx.img
grub >boot

#sudo update-grub
#sudo grub-install /dev/sda6