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Matifou
Asked: 2020-11-23 11:47:03 +0800 CST

grub-reboot: not seeing the Windows entry listed?

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I am trying to use grub-reboot to boot just once to Windows (following this post).

Strangely enough, using the auto-completion from grub-reboot (or awk -F\' '/menuentry / {print $2}' /boot/grub/grub.cfg from this post,) I only see Ubuntu entries, or the last one UEFI Firmware Settings. Am I not supposed to see the Windows entry listed? How would I then boot to Windows at next restart?

Here is the output from awk -F\' '/menuentry / {print $2}' /boot/grub/grub.cfg:

Ubuntu
Ubuntu, with Linux 5.4.0-54-generic
Ubuntu, with Linux 5.4.0-54-generic (recovery mode)
Ubuntu, with Linux 5.4.0-53-generic
Ubuntu, with Linux 5.4.0-53-generic (recovery mode)
Ubuntu, with Linux 5.4.0-52-generic
Ubuntu, with Linux 5.4.0-52-generic (recovery mode)
UEFI Firmware Settings
grub2 boot dual-boot uefi

1 Answers

  1. Since you use UEFI, you can make use of it's next-boot-feature.

    All you need is the efibootmgr-command. Use

    efibootmgr -v

    to see the list of your boot entries. Then choose the entry for the next boot with

    sudo efibootmgr -n XXXX

    where XXXX is the number of the desired entry from the list.

    reboot
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