It seems that neither winsub or woeusb are installable, except from source but I don't want to go down that rabbit hole, on Ubuntu 18.04. So what is the normal way of making the simplest thing - a bootable Windows USB?

  • 3
    Some of the answers there don't apply to 18.04 unfortunately which is why I asked it again.
    – Alex Botev
    Apr 26, 2018 at 5:55
  • @AlexBotev: In that case please refer to the answers that apply to 18.04 instead. Unless all answers are outdated I don't see a need for a new question. May 4, 2018 at 7:50
  • Well, the winusb and other similar programs do not run on 18.04. I tried the answer given below but that does not seem to make a bootable USB stick either. So at this stage, I'm yet to see an answer that actually works in 18.04?
    – Alex Botev
    May 6, 2018 at 17:23
  • 1
    mkusb works in 18.04 LTS. See this link, mkusb-nox and mkusb version 12 can create Windows install drives
    – sudodus
    May 7, 2018 at 14:07
  • @sudodus I got this error at the end: Bootloader: Installing for i386-pc platform. grub-install: error: cannot find a GRUB drive for /dev/sda1. Check your device.map. mkcmd_runcmd: mk_msdos:error grub-install:error. Failed. p_clean: clean if necessary and return clean if necessary and quit
    – Alex Botev
    May 11, 2018 at 8:05

2 Answers 2


UPDATE: a more modern and user friendly way to create a bootable drive in ubuntu is using the multibootusb application.

download the deb package and install.

from my testing of it, it can create:

  • linux [persistent] bootable drives for uefi and bios
  • windows bootable drives for uefi and bios
  • multiboot [persistent] linux bootable drive. ie multiple linux bootable ISOs on one drive
  • windows and linux multiboot drive. ie windows and linux reside on the same partition of the same drive

to create a windows bootable:

  1. Insert an empty drive. usually formatted as fat32
  2. Launch the application
  3. select the drive partition (eg /dev/sdXY) from the select usb drop down
  4. select the windows ISO file
  5. Click Install

OLD ANSWER: First find your usb device name:


you get something like

sr0           11:0    1 1024M  0 rom  
sda           179:0   0 4.2G  0 disk 
├─sda1  1      79:1   0 3.8G   0 part /home/user/blabla

based on the sizes your USB disk we are assuming your USB is sdX in this case sda so /dev/sda
replace this with yours

unmounted the usb device.

then put an mbr table on it (all info on it would be lost):

sudo parted /dev/sdX mklabel  msdos

then create a brand new partition on the device:

sudo cfdisk /dev/sdX

choose New enter the appropriate value and hit enter then select primary followed by Write and type yes to create the partition

lets check the partitions again to be sure:


format the partition to the appropriate format:

sudo mkfs.fat -F32  /dev/sdXY

where y is a number

mount the partition:

sudo mount /dev/sdXY /mnt

now let us extract the windows iso unto the usb:

sudo apt install p7zip-full
sudo 7z x /path/to/windowsfile.iso -o/mnt

after extraction unmount the partion:

sudo umount  /mnt

you have created the bootable disk, just reboot and use

  • I'll try it tomorrow and if it works would happily mark it as an answer.
    – Alex Botev
    Apr 26, 2018 at 5:56
  • This worked for me on 18.04. I tried several suggestions before this, and none of them worked.
    – Nocturno
    May 12, 2018 at 4:55
  • Can confirm, this method works.
    – Odyssee
    Aug 13, 2018 at 10:47
  • 1
    It won't work with some windows ISO files because they contain large files (greater then 4GB). Probably using NTFS as fs would work. Jan 10, 2019 at 16:06

If you need this now, you can download repo and run script in src/, like

sudo ./woeusb -d ../../Downloads/Win10_1803_EnglishInternational_x64.iso /dev/sdX

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