Install Kon Boot To Usb
Brie Hoffler
To create installation media, go to the software download website, where you'll find step-by-step instructions. On that website, you can select a version of Windows and create your own installation media using either a USB flash drive or a DVD. To go directly to one of the versions, select one of these links:
I need a Gentoo 13 machine to test some software on the platform. I'm not a Gentoo regular, so I'm suffering their install procedures. I'm at Configuring the bootloader Installing GRUB2, and it failed with:
You may not even need to chroot again to perform grub2-install; For example, you mounted sda4, your partition for /, on /mnt; AND THEN, mounted sda2, your ESP, on /mnt/boot/efi, then you can simply run:
When I dropped GPT and EFI and switched to purely BIOS and MBR, I was able to boot the resulting machine. BIOS and GPT are supposed to be a valid combination, but I'm wondering if it works in practice (see, for example, Bootloader Options).
Inspecting the source for grub2, it seems to demand that /boot be its own file allocation table (FAT) compliant separate partition, maybe for security reasons, It wasn't this way before. grub2 has caved to security conditions inflicted by the motherboard.
Disable any Bios Secure Boot settings in the motherboard's boot startup BIOS/EFI/UEFI utility, and look for any Boot level security settings to disable. Assuming you don't like security. It may be a setting under F7 -> boot -> secure boot.
The fdisk tool appears to be depreciated and marked for removal. The manual says: "You're going to have problems if you use fdisk, and you're on your own." Their solution is to scroll up on the manual and follow the directions on using parted to create your partitions, and mark the boot partition with their suggested bios_grub flag. Then tada, automatically grub knows where to look and what to do.
What if I already have existing grub files in /boot on my partitions? Shouldn't I just need to install the MBR parts of grub and point it to one of my existing partitions' /boot/grub? I was unable to find such an option.
I've downgraded my GPT to MBR and removed my BIOS boot partition, which means I need to reinstall Grub to my MBR, if I haven't misunderstood anything. Without doing that I'm left with a grub rescue prompt that can't even list my partitions when doing ls. I realise that my menu entries might still not work after reinstalling grub to the MBR since they refer to partitions like hd0,gpt5, but having a usable prompt would be good enough, and it would have allowed me to confirm my understanding of grub more easily.
When GRUB boots from a MBR, the number of legacy BIOS compatibility steps it needs to take at the beginning of the boot process means that the code actually in the MBR is only capable of loading one disk block whose LBA number is patched in to the MBR code at the time of installation. That block is usually the first block of GRUB core image. It contains the code to load more blocks, and a list of block numbers that defines where the rest of the GRUB core image is located.
On a GPT-partitioned disk, the blocks immediately after block #0 are occupied by the GPT partition table, so the GRUB core image is embedded into a "BIOS boot partition" instead. That just means the block number embedded into the MBR will not be 1, but instead the number of the first block of the BIOS boot partition, and the rest of the blocks belonging to the core image will be likewise shifted. So on a GPT-partitioned disk with BIOS-style GRUB on it, the physical layout will be something like this, assuming the BIOS boot partition is the first one on the disk:
The fact that you can still get to GRUB rescue mode indicates that although you said you removed your BIOS boot partition, you did not yet overwrite its blocks; although the space occupied by the BIOS boot partition may now be unallocated space between partitions, or unused space in another resized partition, it still has its old contents, and GRUB can still load those blocks and find its core image. But nothing in particular shields those blocks now from getting overwritten: as soon as that happens for whatever reason, the GRUB core image will be destroyed and GRUB will fail to get even as far as the rescue mode.
Since you're now dropping into rescue mode and cannot list your partitions, that indicates the GRUB core image contains the partitioning module for GPT (part_gpt.mod), but not for MBR (part_msdos.mod). Without the MBR partitioning module, it cannot access the partition containing /boot/grub/i386-pc directory, even if the GRUB core image would contain the filesystem driver module applicable to it... and so GRUB cannot load the normal.mod which would let you proceed beyond the rescue mode.
Since UEFI firmware includes FAT32 filesystem support as standard, the native UEFI version of the GRUB bootloader can be packaged as a single grubx64.efi file that contains all the necessary modules, including normal.mod if you wish. It gets loaded as a regular file: no need to fiddle with block numbers or embedded code in fixed disk locations at all.
I found this workaround for getting UEFI boot to work and was wondering is anyone has got this to work. I am not great with Linux so I don't totally understand this but I used the steps and it still doesn't boot UEFI. I am wondering if anybody has gotten this to work recently. Thanks.
I have a HP PC with 4GB RAM, CPU dual core by AMD, 1TB HDD and want to install ubuntu in my PC with dual boot but can I install it without USB Drive and also please tell that which version of 20.10 and 20.04LTS gives better performance, is lag free and works smoothly.
There seem to be ways to install linux without usb drive - I have never tried themMy main recommendation is to make a good backup of your PC before you start even if you do it with a usb-drive !Any issues with your install without a backup and you'll have an unusable PC.
Now after you reboot your Windows PC, it will show a UNetbootin boot entry. You can choose this new entry to boot into the Linux OS and finish installing Linux on your hard drive. Make sure you choose to install it alongside Windows and do not overwrite the Windows partition.
Once the installation is finished, it will reboot into the installed version of Linux through Grub. You can use these instructions for adding Windows to Grub menu after installing Ubuntu or Debian based Linux distributions.
I have a generic Intel motherboard with a sata ich9 controller, home lab. It has ran esx4 fine ever since esx4 beta. When I load esx5 to hard drive or usb drive on reboot the monitor just displays a cursor. When inserting the esx5 installer cd and rebooting you have two choices 1. Install Esx or 2. Boot from local HD. When selecting boot from local HD, esx5 will boot from the previous install? Seems like the bootloader is not correct. Any ideas?
You can try changing your BIOS to see if it's compatible with EFI or will work in "legacy/compatibility mode". Alternatively you can reinstall and use the "formatwithmbr" setting at the boot prompt which will cause the partitions to be set up the way they were in ESX 4.x. Just add it in the same way you would to tell the machine to do a scripted install.
On a related note, we also had a problem with migrating VMFS partitions from MBR to GPT which would have caused the VMFS partition to potentially have been clipped due to the secondary boot record. If you upgrade from ESX 4.x or ESXi 4.x you still end up with an MBR partition table and not a GPT based one. If you'd used VUM or the installation CD to upgrade your 4.x based system you wouldn't have run into this problem, but probably would have been scratching your head when you tried re-installing from scratch.
Thanks again Patrick. I really appreciate you taking the time to respond. This is my home lab that I learn vSphere with. So I know it's not on the HCL I'm just trying to learn on my home budget. My vendor Intel for my motherboard "Intel Desktop Board DQ35JO" stopped suppling BIOS updates in Dec 2010 so a BIOS upgrade was not an option. It has a E8400 processor an even runs FT VM's. Now when I'm on the road an need to reboot the ESX server I won't have to have the wife place the ESX installer CD in my server to boot with.
Patrick, the formatwithmbr seems to help me as well..mostly. Here's what I'm doing and my issue. I run esxi5 bood CD. do shift + O. Erase runweasel...type in "formatwithmbr". I'm not sure if this syntax is correct. Anyway, ESXi5 loads great this way. Issue is still upon reboot it won't load. I've seen once after about 20 minutes it does load but this isn't acceptable. MB is on HCL, so I'm stuck, and need help. Thanks.
volleyballdan: Don't erase the "runweasel" command. It's was causes the installer to start. Without it you're just booting ESXi and nothing more. Add the "formatwithmbr" and you should end up in the installer (weasel) and your drive with be formatted in a way that your BIOS can understand.
For anyone trying to duplicate these successes, "add" means type a space and formatwithmbr. I first tried a comma, and that didn't help. I didn't try a plus sign because a space worked. So, by "boot prompt" they mean the prompt you get after hitting Shift-O. And by add, they mean a space delimited addition of the string. "runweasel formatwithmbr". Clear as mud? I have no idea why it's so important to be obscure with these tips.
Incidentally, I haven't worked on the installer for over a year, but I have talked with the dev. manager to get some better documentation. Hopefully that will be forthcoming, probably in the way of a KB article.
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