- Get a Windows 10 (or other version) boot image (e.g. windows.iso) file by downloading from Microsoft.
- Insert the USB thumb drive. Note what device Linux has given it. (e.g. /dev/sdb ).
- Put a partition on the drive with fdisk.
- Put a file system on the drive with mkfs.fat -F32
- Copy boot image to thumbdrive with dd bs=4M if=/home/microsoft.iso -of=/dev/sdb