Grub2 is Grub version 2, a multiboot bootloader from the GNU project.
This is the second version of gnu grub wherein specific improvements were made.
Questions tagged [grub2]
530 questions
51
votes
1 answer
How can I scroll in the GRUB 2 shell?
The outputs of the help and/or vbeinfo command of the GRUB 2 shell are massive. How can I scroll up the output? I've tried PageUp and Shift+PageUp, but nothing happened.
LiuYan 刘研
- 2,775
32
votes
1 answer
grub-probe: warning: disk does not exist, so falling back to partition device /dev/sda1
I am attempting to get GRUB to boot Windows, but I ran into a problem. Whenever I try to run grub-probe --target=fs_uuid /mnt/bootmgr, I get this:
grub-probe: warning: disk does not exist, so falling back to partition device /dev/sda1.
grub-probe:…
Dessa Simpson
- 1,776
26
votes
3 answers
Create Windows 10 USB installation drive with Linux only
By udisk, I mean a 2.5 inch HDD placed in an External Hard Drive Enclosure
I'm quite familiar (not professional, daily use only) with Linux (Arch&Ubuntu) but newbie to Windows. Sometimes I accidentally kill my Windows installation with some silly…
user744579
17
votes
1 answer
Cannot re-enable Bitlocker
I've installed a fresh Windows 10 in a partition on my system, enabling bitlocker. Then I booted Linux from the other partition and overwrote the master boot record with Grub so I could boot Linux and Windows. I also removed an unused NTFS…
lorenzog
- 2,312
12
votes
2 answers
Searching for grub configuration file in CentOS 7
Im searching for grub.conf file in CentOS 7. I cant find it with locate(I called updatedb before). Where does it stores?
In older versions of CentOS I could find it.
BrettWatts
- 155
11
votes
1 answer
Changing GRUB_TIMEOUT value doesn’t seem to work
Yes, I did do sudo update-grub.
Changing the /etc/default/grub GRUB_TIMEOUT variable seems to work once, but then after that first time every time I reboot the timeout is 30 seconds and my time I set is ignored.
I am running Lubuntu and Windows 7.…
Leo Ervin
- 219
10
votes
2 answers
What does GRUB_DEFAULT="1>2" mean?
One of our Debian-servers won't boot into the newest installed kernel, and during troubleshooting I came across this:
grep GRUB_DEFAULT /etc/default/grub
Output:
GRUB_DEFAULT="1>2"
I haven't seen this syntax before. What does this mean?
kenneho
- 233
9
votes
5 answers
From GRUB2, boot an ISO in an LVM2 logical volume
tl;dr - Is it possible to boot from a .iso file that is located in an unencrypted lmv2 logical volume? How?
I'm trying to set this up in a VirtualBox VM before I do it for real with my laptop. I have the following set up:
4 gpt partitions
gpt1 -…
snapshoe
- 1,186
9
votes
1 answer
Linux GRUB2: How to resume from hibernation?
Moving to GRUB2 my Arch Linux no longer resumes from hibernation, because the actual resuming is no longer set up. In GRUB legacy I'd write:
/boot/grub/menu.lst:
kernel /vmlinuz26 root=/dev/disk/by-uuid/X ro resume=/dev/disk/by-uuid/Y ro
But with…
miyalys
- 2,311
9
votes
5 answers
grub2-install: error: /boot/efi doesn't look like an EFI partition on a fresh Gentoo install
I need a Gentoo 13 machine to test some software on the platform. I'm not a Gentoo regular, so I'm suffering their install procedures. I'm at
Configuring the bootloader | Installing GRUB2, and it failed with:
# grub2-install --target=x86_64-efi…
jww
- 12,722
8
votes
2 answers
How do I recreate a wiped /boot filesystem in Ubuntu
I accidentally overwrote the /boot filesystem on a running Ubuntu host where the root fs and swap are LVs, and the kernel, initramfs, etc. are under /boot with grub modules and config under /boot/grub.
How would one go about recreating all the files…
petiepooo
- 338
8
votes
2 answers
How can I discover which bootloader is installed where?
On a Debian Linux box, I'm running into a very strange situation where after power-on, GRUB fails with the error "no such partition", but if I then hit the reset button, it boots normally. I'm trying to diagnose the situation, and I realized that I…
Norman Ramsey
- 2,904
8
votes
2 answers
How do I set up Grub properly to quad-boot Windows, Mac OS X, Linux, and FreeBSD?
Grub has gone completely insane on me. My quad-boot system was working great up until I upgraded Ubuntu to 12.04. Since Ubuntu overwrote the Grub stuff I had to repair it with my Mac OS X and FreeBSD entries. After this, trying to boot Mac OS X gave…
Joe
- 81
8
votes
2 answers
Boot GRUB2 to GRUB or GRUB2 on another disk
I've got a couple of distributions installed, Gentoo with GRUB2, and openSUSE with some other version of GRUB.
OpenSUSE manages it's kernel entries, and I don't want to have to update my main Gentoo GRUB2 config to copy changes after updating. …
RLZaleski
- 302
7
votes
1 answer
Why does my USB hdd returns SG_IO: bad/missing sense data?
I am able to boot and run commands from external USB hdd; the message in question appears for about 45 seconds then booting continues. GRUB2 is installed on internal HDD. When choosing to boot directly to /dev/sdb the message doesn't appear, however…
pfeiffep
- 171