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Apologies in advance and I'm not an expert and I've got access to a machine previously configured without a lot of context.

I know it used to have windows but unsure it currently still has it. I know it us running Ubuntu 20.04 but to boot into it I need to type exit twice in grub.

I'm not Ubuntu expert, so started by looking at existing relevant answers. Here's what I've tried so far:

  1. based on this answer I've installed and grub-customizer and moved Ubuntu, with Linux 5.15.0-56-generic to the top (as this is what I see after running uname -a). (Bellow there's another similar entry: Ubuntu, with Linux 5.15.0-53-generic. Maybe there are two Ubuntu installs ?). I've saved/rebooted: didn't seem to make a difference/still need to type in exit twice after rebooting.
  2. based on this answer I've tried commenting out GRUB_TIMEOUT_STYLE, ran sudo update-grub and rebooted: still no joy.

In grub this is what I can see:

ubuntu grub menu

I don't fully undertsand why I need to type exit in grub , but my hunch is maybe there are two version of Ubuntu installed and the current config doesn't explicity boot into one ? (It doesn't list the typical OS select screen though).

How can configure grub so the machine boots into Ubuntu 20.04 on it's own, without me typing exit twice ?

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