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grub2, fallback & recovery

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https://bbs.archlinux.org – I've been trying to understand the generation of grub.cfg and the different options available in grub2's menu at boot time. It seems much more complicated than yaboot!/etc/default/grub contains lines for both GRUB_CMDLINE_LINUX and GRUB_CMDLINE_LINUX_DEFAULT.It seems that GRUB_CMDLINE_LINUX options are added to kernel command lines for all linux options? And that GRUB_CMDLINE_LINUX_DEFAULT options are added to the command lines for normal and fallback linux options, but not recovery linux options?Somebody in the forums also mentioned GRUB_CMDLINE_LINUX_EXTRA as intended for options w (HowTos)

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Submitted by missing on 01/08/2012 – Made popular on 01/08/2012

Stories similar to grub2, fallback & recovery

I am running Ubuntu 12.04.

I cannot for the life of me get the grub menu (with options) to go away.

I would like it to auto-boot into the first option.

Ubuntu 12.10 features a minor but interesting change in GRUB2 Boot Menu.

Menu entries now have 'Ubuntu' as the first option instead of 'Ubuntu with Linux (Kernel version)'.

What I like about Ubuntu is that the GRUB menu always allows me to pick the latest (default) or second-latest (etc.) kernel version at boot time.

In Arch Linux, I can't do that by default. The only options are normal and fallback images, and both boot the latest kernel. How can I achieve the Ubuntu-like behavior in Arch?

Hey guys, I'd appreciate any help with this, as I have very little experience with LVM, LUKS, and Fedora in general.

I tried to add a few boot options to my kernel, so I edited /etc/defaults/grub, and ran grub2-mkconfig -o /boot/efi/EFI/redhat/grub.conf (which appeared to be the GRUB configuration file ot update).

The options I added were: "fastboot i915.i915_enable_rc6=1 i915.i915_ena

I have a bootable usb flash drive with grub2 handling booting of ISOs (mostly different spins of Ubuntu).

Grub2 multiple Fedora's 43 weeks 3 days ago

I have a new laptop (Samsung) and installed Fedora 64 bit on it a little while back. I am dual booting Windows and Fedora. In the meantime I have had two more boot options show up in Grub. They were not there at the beginning.

I recently applied some updates on Ubuntu and when I restarted I booted up windows first then rebooted to Ubuntu. Now the boot menu only shows windows 7 and recovery environment options but no Ubuntu or other Linux options. What can I do to boot into Ubuntu again or get the options back?

Grub2 Advanced Options 1 year 2 weeks ago

I'd like to completely remove any advanced options in my boot menu. All I want to see is one option for each installed OS. Fedora 17 Windows 7 Fedora 16 Fedora 14 Ubuntu (Ultimate Edition) Arch Linux

Does anyone know if this is possible? I don't need 47 freakin' options in the menu!

Thanks for reading.

I recently inherited an iMac from a friend and decided to put Ubuntu and mint on it...I first installed Ubuntu 12.04(replacing mac os x) and of course it installed grub2 with it, after doing an 'update-grub' I got the default grub2 menu when I booted, from this I had the options to boot to Memtest, ubuntu recovery, ubuntu, and the older kernals of ubuntu.

After installing Linux Mint, I could see