create second partition ext4 on the rest of the space.create first partition fat32 of 100MB, set the flags 'esp' and 'boot'.

format the target USB drive with 'gpt' partition table (not msdos). If unsure, do a full backup of your system, including the Windows EFI partition. A single mistake might wipe out the entire hard drive on your PC. The old BIOS boot is more complex to fix and less portable because you depend on a specific drive order. Only (U)EFI boot is covered here, but most recent systems support UEFI. This is more than just a live 'USB Pen Drive Linux' with persistence, it is your full Linux system in your pocket. Such thumb-drive is not only persistent, you can also do regular updates on it, customize the programs, repair the file-system. Ubuntu installer has a bug when installing on USB using a PC that already has an UEFI boot system (like Windows 10).

Regular USB install will likely fail, you need the fix below. This article explains how to install Ubuntu 19.04 or similar on USB+UEFI, like you would do it on a hard drive. I still hope my other work (like above) is even more valuable than such practical article as below. Try making a fresh table, and using Parted's rescue feature to recover partitions.Warning: The driver descriptor says the physical block size is 2048 bytes, but Linux says it is 512 bytes.All these warnings are safe to ignore, and your drive should be able to boot without any problems.Refer to the following message from Ubuntu's mailing list if you want to learn more.This blog is mainly focused on my Philosophical and theoretical ideas.įrom time to time I have practical posts that are too few to deserve a blog by themselves. Is this a GPT partition table? Both the primary and backup GPT tables are corrupt. Or perhaps you deleted the GPT table, and are now using an msdos partition table. Perhaps it was corrupted - possibly by a program that doesn't understand GPT partition tables. However, it does not have a valid fake msdos partition table, as it should. Ubuntu images (and potentially some other related GNU/Linux distributions) have a peculiar format that allows the image to boot without any further modification from both CDs and USB drives.A consequence of this enhancement is that some programs, like parted get confused about the drive's format and partition table, printing warnings such as:/dev/xxx contains GPT signatures, indicating that it has a GPT table.

How to install linux on a flash drive