I followed exactly the steps upto flagging the the two partitions using gpart. The 1MB partition flagged as bios_grub has File System grub2 core.img according to picture shown in steps. For my case there is exclamation sign and under File System it is showing unknown. Secondly, ubuntu was successfully installed on my USB. But is not booting (instead it open grub, which i don't know how to install). May be i need to follow the next steps, "Copy the boot and the EFI folders from the Ubuntu ISO file to the boot,esp partition sdx3". Kindly help how to copy these files to partitions. Personal Note: I have already bricked my Google Pixel C while trying to root it. My ultimate goal was to install ubuntu on my rooted Pixel C. My Computer has Windows 10 installed. Laptop is Asus rog 55VW. Window 10 was upgraded automatically by Microsoft from Windows 8. My Hard disk has no partition is a 750Gb SSD. Reading Bios/ UEFI discussion make me anxious about losing my laptop Windows and data. Thanks I am waiting for some guidance.
2 Answers
The 1 Mb partition flagged as bios_grub is used on systems that are equipped with legacy BIOS's only, when the user wants to use gpt on their boot disk instead of mbr.
If your system is equipped with UEFI and you boot it in UEFI mode, the installer will format the USB flash correctly automatically, creating the necessary efi partition.
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Copy the boot and the EFI folders from the Ubuntu ISO file to the boot, esp partition sdx3
After step "Wait until install is complete" do not reboot or unplug the target USB.
Open the ISO file using
Open With Other Application/Open With Archive Manager.Drag and drop the
bootandefifolders from the Archive Manager to the boot,esp partition, (sdx3).If you have any problems with permissions, etc, open Nautilus using
sudo -H nautilusand try copying again.
Thank you for bringing this to my attention, I will edit the other answer. Please let me know of any other difficulties or if anything else is unclear.
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