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Creating a USB flash startup disk


The creation of the ISO image will erase all existing information from the USB drive.

  1. Download Rufus software and open the downloaded file.
  2. Choose the designated USB flash drive in the Device:
    1. Creating a USB flash startup disk.png
  3. Select Disk or ISO image in Boot Selection.
  4. Click on Select and open the downloaded SafeUTM image.
  5. All other settings remain default.
  6. Click on Start.
  7. In the drop-down menu, select Write in DD image mode.
  8. A dialog window will pop up for you to confirm the USB flash drive write.

Further, follow the instructions of the installation wizard. SafeUTM installation steps are described in the Installation Process article.


In order to create a USB flash startup disk in Linux, all you need is to copy blocks of SafeUTM ISO image to your device. Below two ways to do it are described:

Using the command gnome-disks
2. Creating a USB flash startup disk.png

1. Check image integrity:

$ md5sum /home/safedns/SafeUTM.iso
8c872cb6b720f6fd6683107681645156 /home/safedns/SafeUTM.iso

The size must be the same as in the account the image was downloaded from. If the number is different, the file is corrupted and needs to be downloaded again.

2. Find the USB flash disk in the system:

$ lsblk --nodeps  -o name,size,fstype,tran,model,mountpoint /dev/sd*
sdx   7,5G        usb  USB_DISK_3.0 
sdx1  7,5G vfat                     /run/media/safedns/D661-82E2

We can see there is /dev/sdx USB flash disk, as well as the file system mounted on it.

3. Unmount the file system:

sudo umount /run/media/safedns/D661-82E2

4. Write the image to the disk:

$ sudo dd if=/home/safedns/SafeUTM.iso of=/dev/sdx bs=1M oflag=direct status=progress

5. Prepare the disk to be ejected:

$ sudo eject /dev/sdx