Unmount and format USB drive (FAT32)

# umount /dev/sd[X|Y]

Creating new partition table on /dev/sdX

*) legacy

msdos

mbr

pc

# parted --script /dev/sdX mklabel msdos

*) gpt

guid

# parted --script /dev/sdX mklabel gpt

Write into USB drive

• # dd bs=4M if=ubuntu-20.04-desktop-amd64.iso of=/dev/sdX status=progress oflag=sync

Reboot

• # shutdown -r 0