Error 27 Unrecognised Command
Contents |
? Ask a question, help others, and get answers from the community Discussions Start a thread and discuss today's topics with top experts Blogs Read the latest tech blogs written by cabal unrecognised command sandbox experienced community members >>VIEW ALL POSTS Open Source Software and Linux « Troubleshooot
Unrecognised Command Line Option ‘-std=c++11’
your Linux boot process with GRUB Netbooks, Notebooks, Windows and Linux » Sep 13 2008 12:26AM GMT Grub error 27 unrecognized command and boot errors John Little Profile: Xjlittle Tags: Thanks! We'll email youwhen relevant content isadded and updated. Following Follow Storage If you've administered or customized Linux long enough you've no doubt
Grub Error 27 Unrecognized Command
created a situation at some point where, during the boot process, that GRUB throws an error. We're going to discuss some of these situations below along with ways to work through them. If a file name or partition in the GRUB configuration file is incorrect GRUB won't be able to find critical files such as the Linux kernel. For instance if the root lỗi error 27 unrecognized command directive points to something other than the /boot directory GRUB will throw one of the following errors:
Error 17: Cannot mount selected partition
Error 27: Unrecognized command
Error while parsing number
Cannot mount selected partition
If the GRUB configuration file is completely missing you will see the following:
grub>
If you find yourself at this prompt you can find a list of available commands by hitting the tab key. The first thing that you are going to want to do in any of these cases is check and make sure that your root directive is correct. To do this, at the grub prompt, use the find command to locate the GRUB configuration file. Your search would begin something like this:
grub> find (hd0,0)/grub/grub.conf
where hd0,0 is the 1st hard disk and the 1st partition on the hard disk. Repeat the process using the various partitions on the 1st disk (hd0,1 hd0,2) and so on until you find the configuration file. If the partition is not found you will get an error:
Error 15: F
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 >
Grub Ls Error 27 Unrecognized Command
Fedora 23/24 > Using Fedora Error 27: unrecognised command FedoraForum Search User
Grub Filesystem Type Unknown
Name Remember Me? Password Forgot Password? Join Us! Register All Albums FAQ Today's Posts Search Using Fedora General error 8 kernel must be loaded before booting 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 http://itknowledgeexchange.techtarget.com/linux-lotus-domino/grub-and-boot-errors/ 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 just come across the above error code when trying to boot into vista. Up until now it has always worked. http://forums.fedoraforum.org/showthread.php?t=217059 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 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 W
Thread Status: Not open for further replies. aladdin Registered Member Joined: Jan 9, 2006 Posts: 2,986 Location: Oman YUMI And "Error 27: Unrecognized command." Dear http://www.wilderssecurity.com/threads/yumi-and-error-27-unrecognized-command.326319/ Nate, Thanks for such nice explanation in PM. I have no problem using xBoot and adding all my WinPE and Linux ISOs to it. However, when it comes to YUMI. The Linux http://www.linuxselfhelp.com/gnu/grub/html_chapter/grub_13.html ISOs which are listed in the menu work. However, when I install the WinPE ISOs, they don't work. It gives the following error: "Error 27: Unrecognized command." On Google, the error has error 27 to do with menu.lst. I cannot upload this file for you in PM. I have opened this thread and upload here, so that you can have a look. The ISO is under the directory, Mulitboot/ISOS Best regards, KOR! P.S. I have renamed the menu.lst to menu.txt for uploading purpose! Attached Files: menu.txt File size: 734 bytes Views: 214 aladdin, Jun 16, 2012 error 27 unrecognized #1 n8chavez Registered Member Joined: Jul 19, 2003 Posts: 2,294 Location: Location Unknown I am not completely sure what the issue is. I do know that there were changes in this latest build that would have caused boot errors unless you formatted your drive before using (or followed the instructions I gave you). That could be the issue. Also possible is that there is something special to the Macrium Reflect PE discs that others don't have. I have no idea about that as I only use custom built discs. All custom DVDs, when added to Yumi, are put in Mulitboot/ISOS, all entries made to menu.lst. So we know that the ISO is being copied right. And the menu.lst appears to be correct. If that is true, process of elimination says it's the PE disc. Try anther PE disc (if you can) to see if that's the issue. Below is my menu.lst file # This Menu created with YUMI (Your Universal Multiboot Installer) http://www.pendrivelinux.com default 1 timeout 30 color NORMAL HIGHLIGHT HELPTEXT HEADING splashimage=/multiboot/menu/yumi.xpm.gz foreground=FFFFFF background=000000 title --- Directly Bootable ISOs --- root title <-- Back to Main Menu
specific to the grub shell. Errors reported by the Stage 1 The general way that the Stage 1 handles errors is to print an error string and then halt. Pressing CTRL-ALT-DEL will reboot. The following is a comprehensive list of error messages for the Stage 1: Hard Disk Error The stage2 or stage1.5 is being read from a hard disk, and the attempt to determine the size and geometry of the hard disk failed. Floppy Error The stage2 or stage1.5 is being read from a floppy disk, and the attempt to determine the size and geometry of the floppy disk failed. It's listed as a separate error since the probe sequence is different than for hard disks. Read Error A disk read error happened while trying to read the stage2 or stage1.5. Geom Error The location of the stage2 or stage1.5 is not in the portion of the disk supported directly by the BIOS read calls. This could occur because the BIOS translated geometry has been changed by the user or the disk is moved to another machine or controller after installation, or GRUB was not installed using itself (if it was, the Stage 2 version of this error would have been seen during that process and it would not have completed the install). Errors reported by the Stage 1.5 The general way that the Stage 1.5 handles errors is to print an error number in the form Error num and then halt. Pressing CTRL-ALT-DEL will reboot. The error numbers correspond to the errors reported by Stage 2. See section Errors reported by the Stage 2. Errors reported by the Stage 2 The general way that the Stage 2 handles errors is to abort the operation in question, print an error string, then (if possible) either continue based on the fact that an error occurred or wait for the user to deal with the error. The following is a comprehensive list of error messages for the Stage 2 (error numbers for the Stage 1.5 are listed before the colon in each description): 1 : Filename must be either an absolute filename or blocklist This error is returned if a file name is requested which doesn't fit the syntax/rules listed in the section Filesystem syntax and semantics. 2 : Bad file or directory type This error is returned if a file requested is not a regular file, but something like a symbolic link, directory, or FIFO. 3 : Bad or corrupt data while decompressing file This error is returned if the run-length decompression