Hacker Public Radio

HPR4231: Duplicating Multiple USB Flash Drives with DD and Tmux on FreeBSD

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Pre-planning and creating
your image:
  1. Create your image with your preferred disk image creation tool. I
    2. used USB Image Tool to create an image from my "golden master" Windows
    11 installation thumb drive A. USB Image Tool: https://www.alexpage.de/usb-image-tool
    Prepare
    your Tmux session on your Linux or BSD-based system.
    1. 'tmux new -s $sessionName' to create a new Tmux session
      2. window with a session name of your choice.
    2. 'Ctrl-B-"' to create a horizontal split, putting one
      3. pane over the other.
    3. 'Ctrl-B-%' to create a vertical split, putting one pane
      4. next to the other.
    4. 'Ctrl-B-UpArrow' or 'Ctrl-B-DownArrow' to
      5. move to the pane you want to split if you split the window with a
      horizontal line.
    5. 'Ctrl-B-LeftArrow' or 'Ctrl-B-RightArrow'
      6. to move to the pane you want to split if you split the window with a
      vertical line.

      https://tmuxcheatsheet.com/

      Duplicate
      4 USB thumb drives from a disk image within your new, split-paned Tmux
      session:
      • CHECK DMESG FOR THE CORRECT DEVICE NAME AND WRITE IT
        • DOWN!!!
        • FreeBSD will show dmesg output on TTYv0, or you can use the dmesg
          • command on Linux or BSD. You don't want to end up wiping your system
          drive!
        • Within your Tmux session:
          • Pane 1:
            • 'dd if=$diskImageName of=/dev/da0 bs=1M status=progress' to
            begin imaging USB thumb drive #1.
          • Pane 2:
            • 'dd if=$diskImageName of=/dev/da1 bs=1M status=progress' to
            begin imaging USB thumb drive #2.
          • Pane 3:
            • 'dd if=$diskImageName of=/dev/da2 bs=1M status=progress' to
            begin imaging USB thumb drive #3.
          • Pane 4:
            • 'dd if=$diskImageName of=/dev/da3 bs=1M status=progress' to
            begin imaging USB thumb drive #4.
          • 'Ctrl-B-:' to call the Tmux command prompt, followed by
            • 'setw synchronize-panes' to sync the 4 panes to your
            commands. The primary pane will be highlighted in red, and the secondary
            panes will copy whatever command it typed into that primary pane.
          • Hit Enter to begin the process on all 4 panes.
          • When the image finishes, you can remove the USB thumbs drives, pop
            • in 4 more, hit the Up arrow on the primary pane to pull up the previous
            commands on their respective panes, and hit Enter. When in doubt, refer
            to Step 0!!
          • Repeat as needed.

            • If you need to de-synchronize your Tmux panes, just type

            'Ctrl-:' to call the Tmux command prompt, followed by
            'setw synchronize-panes' to toggle pane synchronization on
            and off (or you can use the up arrow at the Tmux command prompt to bring
            up that previously-typed command).

            The faster your USB ports and USB thumb drives, the better!

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