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Grub Error 27 Unrecognized Command

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it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top Trouble booting server from GRUB prompt up vote 4 down vote favorite I just installed CentOS 6.2 on my server but it keeps going to the GRUB prompt. I've never used grub list disks Grub before but did some digging online. Looks like I have to run the kernel command before I can boot the system. However, the kernel command is not running. As I installed the OS I checked the box that said something like "Install boot loader on /dev/sda". The following is what I've done: grub> find /vmlinuz-2.6.32-220.el6.x86_64 (hd1,0) grub> root (hd1,0) grub> kernel /vmlinuz-2.6.32-220.el6.x86_64 root=/dev/sda1 Error 27: Unrecognized command I've tried it with and without the root=/dev/sda1, just /dev/sda, also tried a ro inserted in the middle but nothing works. I've read the docs but at a bit of a loss. Any suggestions? linux centos grub2 share|improve this question edited Dec 27 '13 at 0:39 Braiam 16.9k955100 asked Feb 8 '12 at 22:43 ngramsky 12113 migrated from serverfault.com Feb 8 '12 at 23:17 This question came from our site for system and network administrators. I suggest writing a real question... not "any suggestions?" –Chris S Feb 8 '12 at 23:18 The question is 'How to boot the server', as noted in the title. I've had my questions downgrade

Today's Posts Advanced Search Find the answer to your Linux question: Entire Site Articles Downloads Forums Linux Hosting Forum Your Distro Ubuntu Linux grub repair If this is your first visit, be sure to check out the FAQ by clicking the link grub command line above. You may have to register before you can post: click the register link above to grub prompt proceed. To start viewing messages, select the forum that you want to visit from the selection below. ** If you are logged in, most ads grub command line boot will not be displayed. ** Linuxforums now supports the Tapatalk app for your mobile device. Page 1 of 2 1 2 Last Jump to page: Results 1 to 10 of 12 Thread: grub repair Thread Tools Show Printable Version Email http://unix.stackexchange.com/questions/31226/trouble-booting-server-from-grub-prompt this Page… Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode Enjoy an ad free experience by logging in. Not a member yet? Register. 04-16-2007 #1 R3N3G4D3 View Profile View Forum Posts Private Message View Articles Just Joined! Join Date Apr 2007 Posts 12 grub repair I have Windows and Ubuntu installed on my laptop as dualboot. The way the partition table was setup is: hda1 = Windows XP (primary) hda2 = Unused (primary) http://www.linuxforums.org/forum/ubuntu-linux/91700-grub-repair.html hda3 = Extended hda5 = Ubuntu / (Logical inside hda3) hda6 = Ubuntu swap (Logical inside hda3) hda7 = NTFS storage partition (Logical inside hda3) Everything was working fine, until Windows corrupted itself. After reinstalling Windows, it got rid of grub MBR, so now only Windows can boot up. I've looked at several fixes online, but none seem to work for me. Here is what I tried and results I got: 1.) With Gentoo CD tried "mkdir dummydir", "mount /dev/hda3 dummydir", after this I went into dummydir and it did indeed contain the stuff from hda5 (Ubuntu root directory) (also, mounting /dev/hda5 gives an error saying that I need to specify partition type, using -t ext3 says that it's a logical partition and I want to mount extended one instead, which is why I mounted /dev/hda3). After this I tried "chroot dummydir", which changed me to root@livecd. And then I tried using "grub-install /dev/hda" which gave me and error: "/dev/hda: Not found or not a block device. So then instead of that I launched grub and tried "root (hd0, 4)" (since that should correspond to /dev/hda5, also (hd0, 4) is what /boot/grub/menu.lst claims as my Ubuntu partition), however, that command gave me "Error 21: Selected disk does not exist" error in grub. 2.) Burned Fedora Core rescue cd, tried "linux rescue" command. After a few prompts it told me that it would try to find linux partitions and add the

Common F23 Bugs Common F24 Bugs Communicate with Fedora The Documents Bug Reports Fedora Update System (Bodhi) Fedora Build System (Koji) Official Spins FedoraForum.org > Fedora 23/24 > Using Fedora Error 27: unrecognised command FedoraForum Search User Name Remember Me? Password Forgot Password? Join Us! http://forums.fedoraforum.org/showthread.php?t=217059 Register All Albums FAQ Today's Posts Search Using Fedora General support for current versions. Ask questions about Fedora that do not belong in any other forum. Google™ Search FedoraForum Search Red Hat Bugzilla Search
Search Forums Show Threads Show Posts Tag Search Advanced Search Go to Page... Thread Tools Search this Thread Display Modes #1 16th March 2009, 05:49 PM wizza Offline Registered User Join Date: Mar 2009 Posts: 14 Error 27: unrecognized command Hi peeps, I have error 27 just come across the above error code when trying to boot into vista. Up until now it has always worked. cant think of anything i have done to make it do this (its got to be me though right?) Has anyone got any ideas PLEASE!! cheers Mark Last edited by wizza; 16th March 2009 at 06:04 PM. wizza View Public Profile Find all posts by wizza #2 16th March 2009, 06:02 PM wizza Offline Registered User Join Date: Mar 2009 error 27 unrecognized Posts: 14 just did a quick test just now. if i change the boot order in the bios for my 'c' drive (sata) to go first vista boots. (fedora is on ide slave) (still getting the problem booting from grub though) Last edited by wizza; 16th March 2009 at 06:07 PM. wizza View Public Profile Find all posts by wizza #3 16th March 2009, 06:06 PM vwbond Offline Registered User Join Date: Mar 2009 Posts: 22 Good job, man. __________________ We close Windows to keep virus out. CentOS 6 (Gnome) running on an old Dell D630 T7250 2Ghz CPU, 3GB DDR MB, Dual booting Win 7 64bit with CentOS 6. Reason for moving to Linux: In Jan 07 Windows Vista was released to the public (in beta form) and the time spent with BSOD errors and system freezes was over the top. Windows finally drove me to find an OS that had more stability. vwbond View Public Profile Find all posts by vwbond #4 16th March 2009, 06:12 PM wizza Offline Registered User Join Date: Mar 2009 Posts: 14 this is my grub.conf file if this helps at all... # grub.conf generated by anaconda # # Note that you do not have to rerun grub after making changes to this file # NOTICE: You have a /boot partition. This means that # all kernel and initrd paths are relative to /boot/, eg. # root (hd0,0) # kernel /vmlinuz-version ro root=/dev/VolGroup00/LogVol00 # initrd /initrd-vers

 

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