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error 27 unrecognized command grub

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process with GRUB Netbooks, Notebooks, Windows and Linux » Sep 13 2008 12:26AM GMT grub ls unrecognized command Grub 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

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or customized Linux long enough you've no doubt 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 grub ls error 27 unrecognized command 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 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 grub filesystem type unknown 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: File not found
Once you have found the GRUB configuration file check it's location against what the boot loader is showing. You can check the contents of the file by using the cat command:
grub> cat (hd0,0)/grub/grub.conf
Another way to find the same information is to locate the stage1 boot loader file:
grub> find /grub/stage1
You will see output specifying the /boot partition:
(hd0,0)
Perhaps the most simple way to get this information is to simply type root at the prompt:
grub>ro

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Useful Links Distrowatch Bugs: Ubuntu PPAs: Ubuntu Web Upd8: Ubuntu OMG! Ubuntu Ubuntu Insights Planet grub legacy commands Ubuntu Activity Page Please read before SSO login Advanced Search Forum The Ubuntu Forum Community Ubuntu Official Flavours Support General Help [ubuntu] Grub>

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uuid - Error 27: Unrecognized command? Having an Issue With Posting ? Do you want to help us debug the posting issues ? < is the place to report it, thanks ! Results 1 to 5 of 5 http://itknowledgeexchange.techtarget.com/linux-lotus-domino/grub-and-boot-errors/ Thread: Grub> uuid - Error 27: Unrecognized command? Thread Tools Show Printable Version Subscribe to this Thread… Display Linear Mode Switch to Hybrid Mode Switch to Threaded Mode January 8th, 2012 #1 2CV67 View Profile View Forum Posts Private Message Dark Roasted Ubuntu Join Date Dec 2006 Location Alsace Beans 943 DistroUbuntu 15.10 Wily Werewolf Grub> uuid - Error 27: Unrecognized command? Even after installing the most recent version of Legacy Grub proposed by SynApt for Ubuntu https://ubuntuforums.org/showthread.php?t=1906038 10.04 LTS (0.97-29ubuntu60.10.04.2), if I open a grub terminal & try "grub> uuid" I still get "Error 27: Unrecognized command" where I would expect to see a list of my partition uuids. Is that normal or not? Is there an explanation or diagnosis or fix? Note: I already mentioned this in another thread, but maybe it got lost in that jungle, hence this specific question. Thanks! Visit Ubuntu GUI Fan Club . . . . Visit Disconnected Jottings from Alsace Acer Aspire TC-100-007: Multi boot W10 / 15.10 Unity / 14.04LTS: Canon iP7250: Epson V200: also Asus 1015PED: W7 / 14.04.1LTS Unity Adv Reply January 8th, 2012 #2 speed32219 View Profile View Forum Posts Private Message Frothy Coffee! Join Date Feb 2007 Beans 228 Re: Grub> uuid - Error 27: Unrecognized command? I never used that, have you looked in a file you created "uuid"? To look at my partitions and UUID's, I run the command "sudo blkid". Maverick 10.10. IF you want to save them do: sudo blkid > UUID_1_07_12 Last edited by speed32219; January 8th, 2012 at 05:14 PM. Adv Reply January 8th, 2012 #3 oldfred View Profile View Forum Posts Private Message Super Master Roaster Join Date Jun 2009 Location SW Forida BeansHidden! DistroUbuntu 16.04 Xenial Xerus Re: Grub> uuid - Error 27: Unrecognized command? The grub command line has few commands. To

grub (Ubuntu) Edit Invalid Undecided Unassigned Edit You need to log in to change this bug's status. Affecting: grub (Ubuntu) Filed here by: jvivenot When: https://bugs.launchpad.net/bugs/135683 2007-08-29 Completed: 2007-09-10 Target Distribution Baltix BOSS Juju Charms Collection Elbuntu Guadalinex Guadalinex Edu Kiwi Linux nUbuntu PLD Linux Tilix tuXlab Ubuntu Ubuntu Linaro Evaluation Build Ubuntu RTM Package (Find…) Project (Find…) Status Importance Invalid Undecided Assigned to Nobody Me Comment on this change (optional) Email me about changes to this bug report Also affects project (?) Also affects distribution/package error 27 Nominate for series Bug Description Binary package hint: grub Date: Wed, 29 Aug 2007 23:40:10 +0200 Package: grub Version: 0.97-29ubuntu3 Severity: important I just upgraded to Gutsy and had this problem. Grub can't boot on my Windows partition if I leave the savedefault command, because it returns an unrecognized command error. Thanks. Julien Vivenot -- System Information: Debian Release: lenny/sid error 27 unrecognized APT prefers gutsy-updates APT policy: (500, 'gutsy-updates'), (500, 'gutsy-security'), (500, 'gutsy') Architecture: i386 (i686) Kernel: Linux 2.6.22-10-generic (SMP w/1 CPU core) Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages grub depends on: ii libc6 2.6.1-1ubuntu1 GNU C Library: Shared libraries ii libncurses5 5.6+20070716-1ubuntu1 Shared libraries for terminal hand ii volumeid 113-0ubuntu7 volume identification tool Add tags Tag help Tormod Volden (tormodvolden) wrote on 2007-09-09: #1 Thanks for your bug report. Please post your menu.lst file. The #savedefault= option is by default false so there should not be any savedefault commands in the boot entries. Changed in grub: assignee: nobody → tormodvolden status: New → Incomplete jvivenot (jvivenot) wrote on 2007-09-10: #2 There was one in my Windows XP boot section, and I swear I didn't add it manually. But I can't give you my menu.lst For several other reasons, I've removed Windows XP from this specific computer. :-s Tormod Volden (tormodvolden) wrote on 2007-09-10: #3 Thanks. Feel free to reopen if you can reproduce the issue. Changed in grub: assignee: tormodvolden → nobody status: Inc

 

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