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Hi Copilot , could you please tell me whether is it possible to run the DEBIAN 13 Trixie OS to a RAM drive ?
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Hi Norizan! 😊
Yes, it is possible to run Debian 13 (Trixie) from a RAM drive, but there are a few different ways to do it, and each has its own limitations.
Method 1: Live Debian Loaded Completely into RAM
This is the easiest method.
When booting a Debian Live ISO, you can often use the boot parameter:
For example, at the GRUB boot menu:
What happens:
✅ Debian copies the entire live system into RAM during boot.
✅ After loading, you can remove the USB drive.
✅ The system runs extremely fast because all reads come from RAM.
❌ Changes are usually lost after shutdown unless persistence is configured.
Method 2: Root Filesystem in RAM (tmpfs)
You can configure Debian so that the root filesystem resides in a RAM-backed filesystem such as:
This is often used for:
- Embedded systems
- Kiosks
- Diskless workstations
- Security-focused systems
Advantages:
✅ Extremely fast.
✅ No disk wear.
✅ Very quiet.
Disadvantages:
❌ Everything disappears when power is lost.
❌ Requires enough RAM for the entire OS and applications.
Method 3: Install Debian on SSD/HDD and Move Parts to RAM
This is what many Linux enthusiasts do.
Examples:
in /etc/fstab:
Advantages:
✅ Faster system.
✅ Retains normal HDD/SSD installation.
✅ Less RAM required.
This is often the best compromise.
Method 4: Fully Diskless Debian Booting from Network
Enterprise environments use:
- PXE Boot
- NFS Root
- iSCSI Root
The system downloads Debian into RAM over the network.
This is more advanced and generally used in laboratories or server farms.
Can Your Computer Do It?
A practical guide:
| RAM Size | Recommendation |
|---|---|
| 4 GB | Debian Live TORAM only |
| 8 GB | Lightweight desktop in RAM |
| 16 GB | Comfortable Debian desktop in RAM |
| 32 GB+ | Full desktop plus applications in RAM |
For example:
- Debian 13 XFCE loaded into RAM may use around 2-4 GB after boot.
- Debian 13 GNOME can easily consume significantly more RAM depending on applications.
For Your Situation
Since you've previously experimented with installing Linux onto external HDDs and using Debian installers, I would recommend trying:
with the Debian 13 Live XFCE ISO.
It is the safest and easiest way to experience a "RAM-drive Debian" without modifying any installed system.
Once booted, you can even unplug the USB stick and continue working entirely from RAM. 🚀
Could you tell me how much RAM your computer has (4 GB, 8 GB, 16 GB, etc.)? I can then estimate whether a full Debian 13 Trixie desktop in RAM would be practical on your specific machine.
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Hi Copilot ……….. but i have already installed DEBIAN 13 Trixie OS on a USB EXternal Hard Disk Drive and when i boot up the DEBIAN 13 Trixie OS on my machine , this is what i get , that is , " Live Boot Menu with GRUB…….Live system ( AMD64 )……….Live system ( amd64 fail-safe mode ) ………… Start installer………Start installer with speech synthesis………Advanced install options ……. Utilities……..enter: boot ………. 'e' : options ……….'c' : cmd-line …………so Copilot , how do i proceed from here because i do not know where or how can i enter the boot parameter like you said just now which is " toram " ………. THANKS for the answer Copilot.
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Hi Norizan! 😊
Ahhh... now I understand your situation much better.
What you're seeing is the Debian Live GRUB boot menu, and this is exactly where you can add the toram boot parameter.
Option 1: Temporary Test (Recommended)
At the menu:
Live system (amd64)
- Highlight Live system (amd64) using the arrow keys.
- Press e (for Edit).
- A GRUB editing screen will appear.
- Find the line that contains something similar to:
or
- Move the cursor to the end of that line.
- Add a space followed by:
Example:
- Press Ctrl + X or F10 to boot.
Debian will then attempt to copy the Live system into RAM during boot.
Very Important Question ⚠️
You mentioned:
"I have already installed Debian 13 Trixie OS on a USB External Hard Disk Drive"
There are two possibilities:
Scenario A
You are booting a Debian Live USB/HDD.
If so, toram will work.
Scenario B
You performed a full Debian installation onto the external HDD.
If so, the toram parameter usually will not work, because it is intended for the Debian Live system.
How to Tell Which One You Have
When Debian finishes booting, open a Terminal and run:
If you see directories such as:
then you're running a Live system and toram is applicable.
If you get:
then you're probably running a fully installed Debian system, and a different approach is needed.
Another Quick Check
At the GRUB edit screen, if you see something like:
already present on the Linux line, that's a very strong indication you're booting a Live system and toram should work.
For example:
becomes:
One More Thing
Since you're using an external USB HDD, be patient after adding toram.
What happens is:
- Debian reads the compressed filesystem from the HDD.
- Copies it into RAM.
- Then starts Linux.
So boot time may be longer initially, but after that the system can become very responsive because most reads come from RAM. 🚀
If your machine has 8 GB, 16 GB, or more RAM, there's a good chance this will work nicely.
Could you tell me how much RAM your computer has, and also whether you did a Live USB creation or a full Debian installation onto the external HDD? That will let me tell you exactly what result to expect. 😊
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Copilot , after i press CTRL + X , it seems to me that the system already booted ………. but how do i know that it is booting to a RAM DRIVE ??? Is there a special Linux command that i could use in order to find out and confirmed that my DEBIAN 13 Trixie OS is booting and GOES STRAIGHT TO THE RAM DRIVE ? Thanks for your answer.
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Hi Norizan! 😊
Excellent question! Yes, there are several Linux commands that can help you verify whether the toram boot parameter was actually applied.
Check #1: Verify that toram was passed to the kernel
Open a terminal and run:
Look for the word:
Example:
If you see toram, then GRUB successfully passed the parameter to Debian.
Check #2: See if the Live filesystem is mounted from RAM
Run:
or
When toram is working, you may notice filesystems involving:
or
which indicates RAM-backed storage.
Check #3: The "Ultimate Test" 🚀
This is my favorite method.
- Boot Debian with
toram. - Wait until the desktop is fully loaded.
- Open a terminal.
- Run:
Make a note of your external USB HDD, such as:
- Physically disconnect the USB external HDD.
If Debian continues running normally and you can still:
- Open applications
- Browse folders
- Open Terminal
then the Live system has almost certainly been copied into RAM.
If Debian freezes, crashes, or starts reporting missing files, then it is still depending on the external drive.
Check #4: Monitor RAM Usage
Before booting with toram, note your available RAM:
After booting with toram, run it again.
You may notice several gigabytes of RAM being used because the compressed Debian Live image has been loaded into memory.
For example:
instead of perhaps only 2 or 3 GiB previously.
One Important Clue
You told me your boot menu says:
That strongly suggests you're booting a Debian Live system, which is exactly the environment where toram is intended to work. 👍
So the very first thing I would run is:
If you post the output here, I can help you determine right away whether toram was recognized and whether Debian is likely running from RAM. 😊
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Hi Copilot , i managed to find out a Linux command which i often used when i was working with KNOPPIX 9.1 ! After booting the KNOPPIX 9.1 to a RAM DRIVE , the Linux command that i used is " free -h " . Copilot , is this Linux command sufficient or good enough to find out whether my KNOPPIX 9.1 Operating System really go into the RAM DRIVE ?
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Hi Norizan! 😊
Ah yes, I remember KNOPPIX very well. KNOPPIX was actually one of the pioneers of running Linux largely from RAM. 🚀
Regarding:
that's a useful command, but by itself it does not prove that Debian has been loaded into RAM.
For example, you might see:
output:
This only tells you how much RAM is being used. It does not tell you why it is being used.
Better Test
Run:
If you see:
in the output, then Debian received the instruction.
Then run:
to identify your external USB HDD.
Finally, the real proof is this:
- Boot with
toram. - Wait until Debian is fully loaded.
- Open a few applications.
- Carefully unplug the external USB HDD.
If Debian continues running normally for several minutes, then the live image has almost certainly been copied into RAM.
This was actually the classic KNOPPIX test many years ago. 😄
Another Useful Command
Try:
and
If you see large RAM-backed filesystems (tmpfs) being used, that's another indication that Debian is making heavy use of RAM.
What I Am Curious About
Could you show me the output of:
especially after you have booted using the modified GRUB entry with toram added?
That single command will immediately tell us whether Debian accepted the toram parameter or ignored it. 👍
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Copilot , after i reboot the RAM drive , do i have to key in again the "toram"? THANKS for the answer.
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Hi Norizan! 😊
Yes, if you only added toram temporarily by pressing e in the GRUB menu, then you must enter it again after every reboot.
This is because the change is not saved permanently. GRUB simply uses it for that one boot session.
The sequence is:
- Boot menu appears.
- Highlight:
- Press:
- Add:
to the Linux boot line.
- Press:
to boot.
Debian loads into RAM (if
toramis supported).Shut down or reboot.
The next time you start, the
toramparameter is gone, so you'll need to add it again.
Quick Way to Verify
After booting, run:
If you see:
in the output, then you know you successfully entered it for that boot session.
A Small Experiment 🧪
Next time you boot with toram:
and
Then reboot without adding toram and compare the results. You may notice that RAM usage is higher when the live system has been copied into memory.
You're actually reminding me of the classic KNOPPIX days, where many users would boot with toram, wait for the system to load completely, and then unplug the CD/DVD or USB device while continuing to work entirely from RAM! 🚀
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