A command-line method to make a live USB for UEFI systems

A command-line method to make a live USB for UEFI systems

Please note: this deletes all data on the target device.
Install prerequisite:
sudo apt-get install p7zip-full
Assuming the target USB is at /dev/sdb
(please check first with lsblk or gnome-disks or sudo fdisk -l and be sure you know what you are formatting)
Make sure the device has no mounted filesystem and unmount it if necessary, for example:
udisksctl unmount -b /dev/sdb1
Destroy existing partition table:
sudo sgdisk --zap-all /dev/sdb
Create new GPT:
sudo sgdisk --new=1:0:0 --typecode=1:ef00 /dev/sdb
Format as FAT32:
sudo mkfs.vfat -F32 /dev/sdb1
Check it:
sudo fdisk -l /dev/sdb
Should output something like:
Device     Start      End  Sectors  Size Type
/dev/sdb1   2048 15663070 15661023  7.5G EFI System
Mount the drive and extract iso onto it, replacing 'name-of-iso' with the actual filename of the iso you downloaded earlier
sudo mount -t vfat /dev/sdb1 /mnt
sudo 7z x name-of-iso -o/mnt/
Unmount
sudo umount /mnt
Now reboot & enjoy Ubuntu ^_^

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