How to increase grub timeout (UEFI)?

I want to increase the timeout in the grub boot-menu (on an UEFI machine with several OSs).
I’m used to grub-customizer on Ubuntu, but I’ve read that is deprecated in Manjaro, because it somehow conflicts with the system’s boot-configuration.

How do I do that in a way that

  1. it doesn’t conflict with the Manjaro boot configuration?
  2. it doesn’t get overwritten later by Manjaro?


Just edit the file /etc/default/grub:

These are first few lines:

GRUB_CMDLINE_LINUX_DEFAULT="quiet udev.log_priority=3"

Set GRUB_TIMEOUT to the desired value.

Thanks. That did help me to find a way to configure grub.

But unfortunately only editing this file didn’t change the boot menu. I think I must envoke some command like grub-install or similar. But I’m afraid to do that because this is not a Legacy BIOS PC, it’s UEFI!

You have to run update-grub after changing the file.

Thanks to both of you. That did work!

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