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Error 27 Unrecognized Command

Linux, FreeBSD and other Un*x-like operating systems. Join them; 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 grub error 27 unrecognized command 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 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 lỗi error 27 unrecognized command 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 downgraded in the past for not showing what I have tried thus far. I'm trying to boot the server and have attempted to do so with the following approach... –ngramsky Feb 9 '12 at 0:13 add a comment| 3 Answers 3 active oldest votes up vote 1 down vote Your missing commands, which is the main reason your having this problem. I also recommend entering your commands from the edit screen, and then booting with CTRL-X here is an example, I would assume you will ha

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Search Forums Show Threads Show Posts Tag http://unix.stackexchange.com/questions/31226/trouble-booting-server-from-grub-prompt 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 just come across the above error code when trying to boot into vista. Up until now it has always worked. cant think of http://forums.fedoraforum.org/showthread.php?t=217059 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 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

Format For Printing -XML -Clone This Bug -Last Comment First Last Prev Next This bug is not in your last search results. Bug64950 - Pressing `e' may give "Error 27: Unrecognized command" Summary: https://bugzilla.redhat.com/show_bug.cgi?id=64950 Pressing `e' may give "Error 27: Unrecognized command" Status: CLOSED NOTABUG Aliases: None Product: Red Hat Linux Classification: Retired Component: grub (Show other bugs) Sub Component: --- Version: 7.3 Hardware: i686 Linux Priority low Severity low TargetMilestone: --- TargetRelease: --- Assigned To: Jeremy Katz QA Contact: Docs Contact: URL: Whiteboard: Keywords: Depends On: Blocks: Show dependency tree /graph Reported: 2002-05-14 20:04 EDT by Need Real Name Modified: 2008-05-01 11:38 EDT (History) CC List: error 27 0 users See Also: Fixed In Version: Doc Type: Bug Fix Doc Text: Story Points: --- Clone Of: Environment: Last Closed: 2002-05-15 17:52:59 EDT Type: --- Regression: --- Mount Type: --- Documentation: --- CRM: Verified Versions: Category: --- oVirt Team: --- RHEL 7.3 requirements from Atomic Host: Cloudforms Team: --- Attachments (Terms of Use) Add an attachment (proposed patch, testcase, etc.) Groups: None (edit) Description Need Real Name 2002-05-14 20:04:33 EDT Description of Problem: error 27 unrecognized * Pressing `e' in grub boot screen sometimes gives the following error: ------------------------------ Booting command-list S Error 27: Unrecognized command Press any key to continue... ------------------------------ * Then things work fine Version-Release number of selected component (if applicable): * grub-0.91-4.src.rpm How Reproducible: * Press `e' in grub Steps to Reproduce: 1. Use grub as the boot loader 2. Boot the machine 3. On the grub boot screen, press "e" to edit the entry 4. This will cause the error about 1/3 of the time Actual Results: * Error 27: Unrecognized command Expected Results: * Perfection Additional Information: Comment 1 Jeremy Katz 2002-05-15 17:52:53 EDT I haven't seen this one at all on any of my hardware. What sort of hardware is this on? Also, is it on the edit the boot entry or to edit the command line for the boot entry? Comment 2 Jeremy Katz 2002-09-20 16:39:03 EDT Closing due to inactivity Note You need to log in before you can comment on or make changes to this bug. Format For Printing -XML -Clone This Bug -Top of page First Last Prev Next This bug is not in your last search results. Home | New | Search | [?] | Reports | Requests | Help | NewAccount | Log In [x] | Forgot Password Login: [x] | Report Bugzilla Bug Legal

 

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