How Do I Fix Grub Search Error 15: File Not Found?

 

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It is worth trying these recovery ideas if you encounter the “Grub find error 15 file not found” error on your computer. In most cases, the “Error 15: File Not Found” message appears due to a misconnected connection to the GRUB bootloader configuration report in / boot / grub / menu. Our own error 15 could be caused by the best bad disk, the wrong path or partition phrase, or other errors in your kernel entry in the GRUB menu.

 

 

You are obviously using Grub-Legacy on Ubuntu and the bootloader is used at boot time.

  This error occurs when the specified file name cannot be found, regardless of whetherbut otherwise (as usual the disk / partition information) is fine.Often the error indicates that the corresponding kernel image file is missing.Make sure some of the files it refers to are in your boot partition. 

Next validbut wrong, you need to install a backup boot partition (using root options). The root is commented out here.

  uuid b891774a-0b2d-4ab4-bcfa-23a11a97cae5#root (hd0,0) 

If a specific Gentoo kernel is not located in / dev / sda1, you will need to modify (hd0,0) to access or copy the kernel to the correct partition.

If a Gentoo kernel is present at / dev / sda1, you will need to confirm which grub is being used. Since you are starting with MBR on sdb, I was wondering how the BIOS sees disks. What is root HDX for all Ubuntu is (hd1,0)?

Since you are lucky enough to have Grub2 installed on Gentoo, you could probably use it.

  # Gentoo in menu.lst login path (in ubuntu header) Gentoo Kernel (hd0.0) /Boot/grub/core.img core 

You can access “Error see 15” or “Error 17” if the “/ boot” file system is malicious and therefore the system will not start. This is mainly due to the fact that the main files of the boot machine are missing or not found. It is also very likely that the application system “/ boot” has been overwritten or formatted, and an error has occurred.

In cases where there is usually a problem with files, for example, due to “vmlinuz- *”, the system displays the error message “Error 15: File not found.” In such a case, the system will go beyond the one- and two-step boot process and even display a feature counter screen, but will not insert the kernel because the kernel documentation is missing or corrupted (vmlinuz- * or related files). It could even result in a “Kernel Panic” error, as suggested below:

[If the “grub.conf” dilemma file existed, the system will fall back to the “grub” prompt. If this is the ONLY problem, the system can be restored from the original image, the initramfs kernel image files. Isn’t it that difficult, so I wouldn’t consider it here]

Let’s see, for most of us, how to fix this problem and get the system back up and running. In this case, you will need to permanently reboot the system in recovery mode to restore the failed system file. The steps / procedures described here apply to RHEL 6/5. However, if possible, I have documented changes thatThe latter were predicted in RHEL 7 and later systems.

This can be a step-by-step description of how to solve this problem.

Step 1. Boot into the recovery environment

Boot into recovery mode to check the boot data and file system. So mount the ISO image, bootable disc, or CD / DVD (whichever options are) and make it primary mainly because of the boot device. Reboot the system and one by one you should see the following screen: In use (I have an RHEL6.9 ISO image file):

Select “Rescue Installed System” – set the language to “English” – set the default keyboard type to “us”, then click / select … “Ok” – Decide – No “to” Configure the network “… And select” Next “click” OK “when the emergency fire was able to detect root and file computers in” / mnt / sysimage “.

Click OK, then select Shell Shell to start the action and enter Rescue Shell mode. At a shell prompt, run the command for that particular chroot / mnt / sysimage to access the actual root filesystem.

Now ourthe system has successfully deployed the mount filesystem in / mnt / sysimage as shown below:

Step 2. Discovery and (root) & / boot the file system and server block devices

As we can see here, the main file system is located on lvm “lv_root”, and the other is located in the volume area “VolGroup”. So let’s run the “vgs” always “lvs” commands to get such details.

According to the above output, there is only one volume group called “VolGroup” which consists of two logical volumes (lv) named “lv_root” and “lv_swap” because two CD partitions were seen, namely: â € / dev / sda1â € œ & â € / dev / sda2â €.

“/ dev / sda2” is the corner device used for the “VolGroup” where you can find the root music file (/ system) and swap it.

At this point, we need to define what the boot device is. Let’s see if a file “/ etc / fstab” is available, which can also tell us about the special block devices used to mount distinguish and mount points:

The above output says that the layer “sameThis color with a UUID is often the block device used by / boot. Let’s try to determine which one comes with this block device using findfs. We need to pass the UUID of the findfs command to find a specific device block as shown below:

The system was unable to determine the device block with this UUID. More importantly, it could be the UUID of the boot device, which would almost certainly change, or the filesystem itself would be out of order.

We could easily determine which block device “/ dev / sda1” this device will start (in most cases, we boot from one side of the SAN enclosures). The other type, “/ dev / sda2”, is a blocking device that is used for the vg “VolGroup”.

Step 3. Try to restore the / dev / sda1 device

Let’s see if we can find “/ dev / sda1”.

I first ran # developer -a (mount all devices as shown in / etc / fstab), which resulted in a specific error saying that a specific device with the option ‘UUID n’ does not exist ‘is available. Then I tried to manually use the mount / commanddev / sda1 / boot which probably failed again like below:

These error messages clearly indicate that the file’s schema is damaged or corrupted. As a final solution, you can run the file verification framework with the command “# e2fsck -n -y / dev / sda1” with the appropriate approach and see if that helps, as shown here (when purchasing RHEL 7, you need to use xfs_repair and if the filesystem – XFS):

The above error message indicates that there is indeed a problem with the “superblock” of the player. So it’s a good idea to check who has the super saveblocks. So let’s take a look at our group if you can find a super backup

 

 

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