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Episode: 4231
Title: HPR4231: Duplicating Multiple USB Flash Drives with DD and Tmux on FreeBSD
Source: https://hub.hackerpublicradio.org/ccdn.php?filename=/eps/hpr4231/hpr4231.mp3
Transcribed: 2025-10-25 21:46:59
---
This is Hacker Public Radio Episode 4231.
From Monday the 21st of October 2024, today's show is entitled, Duplicating Multiple USB
Flash Drives with D.D. and Tmux on Freebie SD.
It is hosted by Claudio Miranda and is about 16 minutes long.
It carries a clean flag.
The summary is Claudio describes his process for mass USB flash drive duplication with
Freebie SD Tmux and D.D.'s.
Hey Hacker Public Radio, this is Claudio Miranda, recording an episode because I know we're
running a bit low on shows.
It has taken me a while to actually get to do this, but I've had it planned for some
time now and I finally was able to get some notes down for this episode.
In this episode, I'm going to discuss how I used Tmux and D.D. to duplicate a USB installation
of Windows 11 for work.
We have an image that we use that we deploy to our all our desktops and laptops of Windows
11 and the way we have to create those USBs is a big cumbersome because there's a script
that we have to launch and then just wait until it creates the image using the Microsoft
tool.
We can't use Rufus or anything like that, we used to, but not anymore.
So it takes a while because we have to do it through a share that's provided to us.
So trying to do these one at a time, especially when I had to do about 30 USB flash drives
took quite a bit of time and they didn't always work.
So I thought I would go ahead and see about probably finding a solution to this.
I looked to see if I could find a USB flash drive duplicator, but they tend to be pretty
expensive depending on which ones you get and I wasn't sure about the cheapy ones.
So I decided to use the tools I already had.
So I have a free BSD box that I use for B-Hive and I said, well, let me see.
I can take and make an image of the actual one of the USB thumb drives with the installation
procedure and create a disk image out of it and then use DD on the free BSD machine to
duplicate it to the other USB thumb drives.
So that's great in all, but I would be stuck again doing them one by one, unless I used
T-mux and T-mux if you're not familiar with it is a terminal multiplexer, which is actually
what the name stands for if I'm not mistaken.
If you're familiar with GNU screen, it's just like that.
There are things that I like about it that I like about T-mux over GNU screen, mainly
the fact that you already have a kind of an information bar at the bottom.
You can do this with GNU screen, but you have to configure it and I'm not going to go
into those details.
But it's out there if you want to look for it on the internet.
I did it once with a, I think I did it with an episode I talked about where it was a,
my Raspberry Pi 1 that I installed, was it an FBSD, I don't remember.
I don't remember.
Anyway, no, it was Pi Core, some sort of one of those tiny core Linux distributions,
but anyway, I digress.
Back to the topic at hand.
So I have a FreeBSD machine, I have DD, I have T-mux.
So I said, let me give this a try and see if I can basically use this FreeBSD machine
as a duplicated pun intended and kind of cut down the time in duplicating these USB flash
drives.
So the first thing I did was since I'm working with Windows initially, I have to create the
image on the USB flash drive using the script that would be the initial USB flash drive I
use as kind of the golden master.
Once I run their script to create the flash drive installation, I started searching, I'd
started to look on the internet because I tried with Rufus, I tried with Elena Etcher,
and all of them gave me errors.
And all I needed was something to create an image of this USB, that would still be bootable.
So I ended up finding this tool, it's called USB Image Tool of all things.
You can find it at https, colon slash slash www.alletspage.de slash USB hype and image hype and
tool.
Now I'm going to put all of this in the show notes along with the steps I used.
So you'll find everything there.
So what I did, I kind of did some pre-planning here to create my image.
So I created the image, you can create it with your preferred disk image creation tool.
So right here I'm going to use this example of mine where I use this particular tool.
So USB Image Tool created the image, a golden master, Windows 11 installation flash drive.
So once I did that, and I had the image, I copied it over to my VSD machine.
And then I prepared my team up session.
Now again, team up you can install Linux or VSD, you can use any Unix-based operating
system to do this, I just chose VSD because it's what I had on hand.
It's my preference.
So and can't finally keep saying that I keep pushing the VSD.
So I might as well keep doing that.
Anyway, so what I did was I created a new team up session.
So I did a command was team up space, new space, dash S space and whatever name I wanted
to give the session name.
So the dash S gives you is what allows you to create the name for this session.
So after that, you can move or you can do what you need to do.
So I went ahead and I did a control B.
And then, well, after the control B, I do a quotation mark.
And that'll create a horizontal split for me.
So I was trying to do four at a time.
So I did a horizontal split, which put one pane over the other, okay?
After that, I did a control B percent to create a vertical split on whatever my
active pane was.
And that would put one pane next to the other.
So in essence, I had to go back to the other one.
I would use the control B up arrow or control B down arrow to move to the pane I wanted
to split.
And then I would split it accordingly.
So after I did that, and I'm going to go ahead and put in the link to a team up
cheat sheet that I found that I had on my phone for the longest time because I've
been wanting to record this episode.
So I'll put that in the link in the show notes, but it's htbs.com slash slash teamux cheat sheet.com.
Okay, so now, once you have your four teamux panes, okay?
You are going to use the DD command to start creating your USB flash drives.
Now, very important, make sure you plug in your USB flash drives first.
And please, please, please check your D-message or your slash bar,
slash logs, slash messages for the correct device name and write it down.
I highly recommend you write it down because DD is also known as the distroyer.
So be sure to not wipe out anything that is important like your main hard drive
because it will do it if you put in the wrong device.
So what I did, I checked for D-message.
And the nice thing about FreeBSD is that in T2Y V0, FreeBSD shows all the output in D-message
or whatever is in slash bar, slash logs, slash messages, and you can view them as you plug them in.
Or you can just check within using the D-message command or catting the log file.
So my process was inside my T-message session.
So I have four pains in my T-message session.
So I'll go to pain1 and the command I'll do, again, this is the commands for FreeBSD.
So make sure you, whatever device name it, it shows as for your chosen operating system, that's what you use.
But I'm going to give my example on FreeBSD.
So in pain1, I typed DDE space, IF, or the input file, equals whatever the name of the disk image was.
Space, OF, which is where the image is going to be sent to your output file, equals slash dev slash DA0.
Space, VS, for block size, I put it as one megabyte.
And then space status equals progress.
And that will give you a progress as to how far this duplicating has gone.
So not just a one thing to add also.
OpenBSD's DDE command does not support the status option.
So if you do it, it's not going to work.
So anyway, what I did was, for the first pain, DDE, IF, equals, whatever the disk image name is,
OF equals slash dev slash DA0, VS equals one megabyte, or one M capital M, I put, or the block size, and the status equals progress.
That is for thumb drive number one.
Remember, we always start with zero when it comes to computer stuff, at least when it comes to the devices.
Now, next thing you're going to do is you're going to switch over to the pain number two, whichever you're going to designate as pain number two.
And do the same thing, except instead of the device name is going to change.
So mine, the first one was DA0, pain number two is going to be slash dev slash DA1.
Now, I switched the pain three, same command, except the devices slash dev slash DA2 for the third USB flash drive.
And then pain four is slash dev slash DA3 for the fourth USB flash drive.
Now notice, I haven't hit enter on any of these yet.
The reason is, TMAX will allow you to synchronize your pain.
So you just give, once you synchronize your pains, whichever one is the primary pain, will send the command to the secondary pains.
So if your primary pain is number four, pains one, two, and three will follow whatever command is sent to pain number four.
So if anyone has ever used CSSH or cluster SSH as it's known, it's very similar to that.
That has that feature as well, something similar.
So in TMAX, what you're going to do, before you hit enter, you're going to do a control and then a colon.
Or I believe it's control be colon.
Let me test that real quick, because I may have to modify my notes here.
Let's see here.
I already have a TMAX session moment here.
So you're going to hear the clicking of my IBM Model M keyboard here, that I've brought to work.
Yeah, there's a mistake in here.
So it is control be then colon to call the TMAX command prompt.
Okay, very similar you're going to see it's going to remind you if you've used VI or VEM.
You're going to see that colon, which is the command line prompt for that.
So then what you're going to type in that command prompt is set W, STW, space, synchronize, hyphen, pains, and then you'll hit enter.
And what that will do, you'll notice that one of the pains will change color.
And in my instance, it turned red based on the color scheme I have in my terminal.
And the other stayed green.
So once you do that, then you can hit enter on the primary pain.
And all of them will begin to start, we will begin to image or create or pass the image over to their respective USB flash drive.
Once that's done, for me, it depends on how faster USB flash drives are and how faster USB ports are.
So the faster they are, the clearer will get through it.
This is the only way that I can figure out how to simultaneously duplicate four thumb drives at a time.
And this saved me a ton of time.
So once it finishes, you can go ahead and remove the USB thumb drives, pop in four more.
And remember, you still have the set synchronized pains enabled.
So all you have to do is hit the up arrow on the primary pain and it will pull up the previous commands.
And then you just repeat and then wait and then just do the same thing. Repeat is needed.
Now, if for whatever reason you need to desynchronize your T-mux pains, all you have to do is type the same command in and it will remove the highlighting from the primary pain.
And then each one will take the command once you're in that pain.
They're no longer synced.
That's what I did. I hope this made some sense to you.
Okay. It was a solution that worked for me.
That tool that I use that USB image tool from AlexPage.de worked wonders for me.
It's a very simple tool. It will create an image from a thumb drive from a thumb drive flash drive in Windows.
And once you have that, you can pass it over either over the network or however you want to do it.
To your unique space machine to use DDT-mux.
I haven't tried this in Windows, so if anybody would like to record an episode on doing such a thing in Windows, feel free.
And I'd love to hear it, especially since we need a lot more shows on Hacker Public Radio.
So lately, I've heard that we're very long shows. We're dipping too much into the reserve queue.
So please, if you can record an episode for Hacker Public Radio.
And I'm glad to see them back after the Internet Archive had been de-dost and compromised.
So I'm glad to hear that the Internet Archive is back as well as the Hacker Public Radio episodes.
I've been missing a few due to that.
But they're back, and I'm getting the episodes again, so thanks again for taking the time to listen to this.
My name is Claudio Miranda and be back for another episode of Hacker Public Radio.
Bye-bye.
You have been listening to Hacker Public Radio at Hacker Public Radio.
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