Ubuntu :: Edit Grub To Tell It What Disks It Should And Shouldnt Be Looking For?
Nov 15, 2010
I upgraded from Jaunty - Karmic - Lucid in very quick succession (and surprisingly succesfully too) but have encountered a slight issue with Grub on booting up since the upgrade.I had a removable HDD plugged in when the upgrade was going on. Now when I boot up Grub stalls and comes up with a message that its looking for SDD5 or something. I can tell it to skip this, but I'd rather it wasn't appearing at all.How can I edit Grub to tell it what disks it should and shouldnt be looking for?
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Nov 20, 2010
my Setup is Fedora 14 x64 + radeon hd 4830 i've downloaded .run package from ati site with latest driver for x64 systems. installed it, but didn't edited grub.conf becouse i didn't understood anything there (probably didn't spent enough time to get things understand) Now i've lost possibility to enter my Fedora system. during boot it lost it's modern blue boot screen (with filling drop), it was replaced by standard old boot screen with triple-color stripe. after this boot screen monitor start blinking going on and off. and on last step i'm getting "Fedora 14 boot bla bla bla something" on screen. nothing works except Ctrl+Alt+Delete. system reboots showing successful daemons shutting sequence. How can i edit grub menu from initial grub screen is it possible to it's own 'e' option or 'c' from grub command line?
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Mar 17, 2011
Now i've lost possibility to enter my Fedora system. during boot it lost it's modern blue boot screen (with filling drop), it was replaced by standard old boot screen with triple-color stripe. after this boot screen monitor start blinking going on and off. and on last step i'm getting "Fedora 14 boot bla bla bla something" on screen....nothing works except Ctrl+Alt+Delete....system reboots showing successful daemons shutting sequence. How can i edit grub menu from initial grub screen is it possible to it's own 'e' option or 'c' from grub command line?
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Aug 14, 2015
When booting, the grub menu appears and allows me to boot from the internal hard disk (sda) any OS there, such as WHEEZY (sda9). On the external disk (sdb) there is a dd'd copy (not an installation) of SQUEEZE (sdb1), which at one time was on sda but which has different partition assigments listed in its grub.cfg than the current ones shown below for sda.
Code:
Select allNAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 111.8G 0 disk
├─sda1 8:1 0 23G 0 part
├─sda3 8:3 0 1K 0 part
├─sda5 8:5 0 3.9G 0 part [SWAP]
├─sda6 8:6 0 11.7G 0 part
├─sda7 8:7 0 19.5G 0 part /home/norman/data
[code]....
Can I manually boot the SQUEEZE copy on sdb1 using grub commands (set, linux, initrd, boot) without disturbing the WHEEZY and other OSs on sda? Or will they be disrupted?Alternatively if for example JESSIE is installed in sdb3, for example, can it be booted similarly without affecting the installations on sda? I hesitate to try this by trial and error because of the work and time involved in rebuilding messed-up OSs to their desired configurations.
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Mar 5, 2011
I have an ASUS A8N-SLI board with an nForce4 raid 1 setup hosting a Windows 7 array over two 500GB disks. I have a third SATA drive with opensuse 11.3 installed and working perfectly. By changing the boot order in the BIOS, I can alternate which system boots at startup. What I want to do is set up a dual boot configuration... I don't care how, but I want a screen that asks me which OS to use, preferably defaulting to Windows so my wife can stil check her email without calling me at work.
I thought the easiest setup would be to set the LINUX drive as the primary device and then add then chainload the Windows disks, and set them first in the boot queue. That way, without any intervention, the system would pause for 8 seconds and see if I wanted to boot LINUX, then boot Windows if I didn't do anything.
The problem is, I can't figure out how to add Windows to the GRUB menu and recognize it. All of the documentation I can find seems to assume that your Windows and LINUX partitions are on the same disk, which mine are not.
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Mar 13, 2010
I need to fix a part of the file and I don't know how to edit it. I'm using the Live CD - I have the install but I need to fix grub.cfg to use it.
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May 28, 2010
I had windows 7 installed on my system prior to the installation of Lucid Lynx. The boot loader for windows is installed in /dev/sda1. The main windows installation is in /dev/sda3 Ubuntu is installed in /dev/sda5.
The grub update has added a loader for windows 7 for /dev/sda3 instead of /dev/sda1. How do i change that to /dev/sda1 in grub 2.0 as it says that it is not recommended to edit grub.cfg in grub 2.0. I know i can add something in custom section but I am not a pro in linux hence i'm not sure how to add that
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Jul 6, 2010
I had to followed this tutorial on how to Install ubuntu on my Toshiba Satellite M35X-S114. I am stuck on step 2 now. I used one of the options and was able to get Ubuntu Desktop 10.04 onto my laptop. But now on my first restart I have to edit the GRUB menu and change the boot option so I will no longer then the black screen when booting. Only problem is I can't get to the edit GRUB menu. I turn the computer on select Ubuntu to boot. A black screen shows up I hit e to edit then the Ubuntu loading screen comes up (The one that says Ubuntu and has the dots below it) That screen stays up for about a half a second and it goes back to black and hangs there.
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Jul 13, 2010
I used Ubuntu a few years back. I simply was not able to make it my main OS since I couldn't get video calling to work reliably enough. Anyways I just installed and noticed my grub menu had many more entries then I have operating systems on my computer. Some reason they came up as duplicates. I have so far gathered they took away my menu.lst, they replaced it with something like etc/general/grub. It appears editing this file doesn't give me the ability to change entries. There are a few I would like to rename, and a few I want to get rid of. There is also some other file that is not supposed to be edited, will I need to edit this or is there another way around it? I found info like this, but it is only adding not removing.
Assuming that you already looked at the grub2 documentation and had trouble figuring out what to do, try this. Use sudo to edit /etc/grub.d/40_custom. It will look like this:
Code:
#!/bin/sh
exec tail -n +3 $0 .....
After making the change, run 'sudo update-grub' to apply the change to your grub config.
TLDR: Grub 2 added extra entries, how do I remove and rename some?
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Aug 22, 2010
i have to edit grub etc/default file but when i open it, it is a read only file (i have to put "i915.modeset=1" in it ) i think i need to do it through the terminal
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Oct 4, 2010
Since I updated my 10.04 LTS program from 2.6.32-24 to 2.6.32-25, both of these show up at the dual boot start up menu. Back when I had 8.04 LTS, I was able to edit my menu.lst file to delete past versions. How do I remove past versions from the grub.cfg file at present?
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Apr 16, 2011
I have GRUB to allow me to boot windows and Ubuntu, i recently noticed that my list of kernels is getting clogged up with all the updates. So i went online to try and find out how to get rid of the unwanted partitions and also how to add new ones - i am going to attempt to hackintosh, and will need to know how to add kernels. What i found out was; the boot menu in GRUB had a file that is supposed to be called 'menu.lst' (Lst not ist), and that all i needed to do was edit this, that it wouldn't delete the kernels, but that i don't need to, i only need to add and remove links to kernels on the GRUB menu. The problem is that after looking, i don't have that menu.lst file, i have a file containing the image files for 'memtest', but not for my GRUB. I am using 10.04, i don't know what version of GRUB im using but i'm using whichever one comes with 10.04. Could someone please point me in the direction of the files i need to edit or what i need to do to add and remove kernels?
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Apr 26, 2011
I installed linux yesterday dual boot win7 but the Fn keys and adjusting the brightness wouldnt work so i tried a few workarounds searches in google. however, when i edited one of the grub lines and when i reboot the system, i see the screen messing up and then goes to black (no display at all). how can i fix this one?
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Mar 17, 2010
How do I reconfigure grub when adding a disk to a machine where both disks have their own MBRs? I have two volumes:Disk 1 - actually mirrored RAID-1 drives managed by ICH9R on the motherboard Disk 2 - a single drive managed by ICH9R on the motherboard, but without RAID. Disk 1 is the "old" disk containing WinXP on the first partition. The MBR of Disk 1 was created by Windows. Disk 2 was built on the machine while Disk1 was unplugged. Disk2 has Win7 on /dev/sda1 and Fedora 12 on /dev/sda7. Obviously, Disk 2 has grub installed on its own MBR.
When I plug-in both Disk 1 and Disk 2 at the same time, I would like to reconfigure grub so that it gives me the option to switch between WinXP on Disk 1, Fedora on Disk 2 and Win7 on Disk 2. (I may also want to install Ubuntu on another partition of Disk 1, but that's a separate issue.) The problem is that when I plug in Disk 1, Disk 1 becomes /dev/dm-0 and Disk 2 becomes /dev/sdc (instead of /dev/sda as when I installed it). (I don't think I can switch this order because I'm worried that Windows will become confused.) So, how do I keep all partitions the same and get them all to work from grub? On which MBR will I need to install grub? How do I configure it to see all 3-4 of my operating systems? Do I fix grub from the Fedora LiveCD?
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Mar 5, 2010
I'm using HP Pavilion dv2108tx I have ubuntu and Win7 dual boot. The problem is every time I change setting to the BIOS there will be a new list of ubuntu boot came up and now I scroll trough the whole list. Is there anyway to edit GURB boot list.
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Mar 22, 2010
I have Windows XP as well as Ubuntu in my desktop. I would like to temporarily disable XP for a month or so, so that One cannot see Windows XP appearing in the grub menu list or during the boot. Is there is any option to edit the grub menu?
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Apr 19, 2010
Previously I could don "sudo nano /boot/grub/menu.lst" to edit in grub the countdown timer from 9 to eg: 2 seconds. I don't know how to do that with 10.4, as there is no file /boot/grub/menu.lst anymore.
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May 12, 2010
How do I edit the Versions listed in GRUB?
I have at least 25 different Versions listed in my GRUB Screen but they are not in the menu.lst !?
I only use 2 of them.
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Jun 29, 2010
I just did a fresh install of Lucid Lynx 10.4, but now whenever I boot up, at the boot loader, Windows 7 is no longer on the list. I want to now how to properly edit grub.cfg in /boot/grub so that I can boot into Windows 7 from the boot loader. The Windows partition is found in /dev/sda2. The folder name is 2EB2621EB261EB33. If anyone could tell me how write the entry in grub.cfg for Windows 7 to boot that would be awesome!
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Oct 22, 2010
I've been using 10.04 for a few months without any problems, but today, I tried to boot into Ubuntu and just got a black screen. I tried the tutorial on this site, and it worked.
I have to do this after every reboot unless I edit the /etc/default/grub file (the second part of the tutorial). I'm not sure how to go about doing this since the article is very vague.
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Nov 30, 2010
I've tried to find it on google, but I want to have my OS Screen Selection to have a cleaner look than what it currently looks like. I understand we can edit Grub 2 but nothing I've found shows me what to edit into the file. I have all of the files I just need to know which one to edit and what to put into the file so my OS selection looks better
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Apr 25, 2011
I have a dual boot system. a 200gb hd with ubuntu 10.10 and windows pro on 100gb hd. the problem im having is the 'black screen' error.
When i boot ubuntu, it boot fine but it shuts off my screen cause its not supporting my video hardware which is a geforce 6100 or something.
I know the fix is to change grub to support older video architecture. Something like changing line 'GRUB_CMDLINE_LINUX_DEFAULT="QUEIT SPLASH NORNODESET"'
But how do i change the grub when the screens off? i can't, right. Is there a way i can change the boot parameters of ubuntu from my windows boot or maybe from the ubuntu virtual desktop?
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Jul 1, 2011
I recently switched my laptop from Ubuntu 11.04 to 10.04.2, and during the process, I used GPARTED to partition the drive so that I could have both versions installed simultaneously while I transferred files and settings and such. A few days ago, I removed the 11.04 partition, formatted and added that disk space to 10.04's /home partition. However, when I boot up, GRUB still gives me the option of loading into the newer 11.04 partition with the newer kernels. How do I remove those options from the GRUB menu? I checked the Ubuntu GRUB help pages, but didn't feel confident that I could do edits without messing up the 10.04 boot settings.
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Aug 12, 2010
I recently installed Fedora 12 on my system. I also have a Windows 7 running, which existed before the Fedora 12 installation.
When I start my computer, I get a screen that says 'Fedora is starting in 3 seconds' and I can either press a key to stop the boot or let it boot Fedora. If I stop the boot, I am taken to a 'choice screen' where I can choose between 'Fedora' and 'Other' with 'Other' being my Windows 7 OS.
Now, here's what I want to do. I want it to be so that, when I start my computer, I am directly taken to that 'choice screen' without the time limit or anything. And then I can choose which OS to boot. Also, is it possible to rename 'Other' to 'Windows 7' ?
How I can edit Grub in order to bring on these changes?
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Jan 1, 2010
If you know Slackware you know Linux. If you know Red Hat you only know Red Hat".Now I made a decision to install Slackware near Ubuntu and Xp.I've installed Slackware with LILO.Well LILO didn't add Ubuntu.So I needed to install from a LiveCD GRUB.Now I've got another problem:GRUB didn't add Slackware.I made a research and realised that I must to edit /boot/grub/menu.lst. This is my hard disk(XP:sda1,sda5;Ubuntu:sda7,sda8;Slackware: /->sda9 /home->sda10): [URL] This is general code for adding an OS to GRUB:
title Slackware
root (hd0,x)
kernel /<vmlinuz_filename> ro root=/dev/hda<partition>
initrd /<initrd_filename>
[code]....
How can I find initrd for Slackware and I'd like to know how I must to write correct code to add Slackware to GRUB?
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Feb 20, 2010
I set up a dual boot system with Win7 and Ubuntu 9.10. Ubuntu is the first OS listed in the boot menu. I would like to change the boot order so Windows is first. Also after running a few updates I now have multiple boot items listed for Ubuntu that I'm sure are no longer needed. Having never edited Grub and searching through the forum, I'm asking help. I going to guess that I want to edit grub.cfg. If so, what do I need to change within the following information?
[Code]....
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Feb 22, 2010
Im tryin to give permission to modify the grub.cfg by the following command chmod 755 /boot/grub/grub.cfg but unfortunately i get the following error.chmod: changing permissions of `/boot/grub/grub.cfg': Operation not permittedHow do you fix this? am i executing the wrong command? I just want to be able to modify the text Windows Vista (boot loader) to Windows Vista in the grub.cfg file.
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Jan 7, 2011
I'm currently running Lucid Lynx, which installed the Grub 2 Boot loader which it currently lists three different Linux kernels. My problem is this:
1. How do I edit the menu to either remove or comment out one or more of the kernels?
2. Can I remove any of the kernels I don't want, which files do I remove, and will doing so compromise my system.
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Feb 3, 2011
I'm dual boot with Vista(TM) and UBUNTU(tm) and ran out of space on Ubuntu partition:I booted Ubuntu 10.04LTS live CD and shrank the VISTA. It would NOT let me grow the extended partition? So now I have:
sda1 ntfs /media/TOSHIBA_SYSTEM_VOLUME 1.46GB
sda2 ntfs /media/SQ004588V03 88GB
sda4 ext3 THIS IS MY NEW PARTITION 15GB
[code].....
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Apr 20, 2011
tried to edit boot time from 10 secs, used correct commands in terminal, then the menu.lst appears but the screen is blank there is no text to edit
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