UNetbootin
UNetbootin creates bootable USB media from Linux distributions and disk images. This page covers image selection, target-device checks, persistence limits and safe cleanup after a test boot.
What UNetbootin provides
UNetbootin writes a selected disk image or supported distribution entry to a USB device so the computer can start a live environment or installer. The tool is a media writer, not a complete backup system: an image's architecture, boot mode and hardware support still determine whether the result starts correctly.
Device and image safety
Confirm the USB device by capacity and current contents before writing. Copy any useful files away first because choosing the wrong target can overwrite another disk. Keep the image file in a known location, compare its checksum when one is available, and test the finished media on a non-critical machine before using it for recovery.
Maintenance note
This page reviews UNetbootin for live media creation, boot testing and removable-device cleanup. Content review date: 2026-08-23.
Save to your cloud drive
Open the cloud drive to get the file directly, or save it for convenient access on another device.
Quark Cloud Drive
RecommendedSave UNetbootin to this cloud drive
Baidu Netdisk
Save UNetbootin to this cloud drive
UNetbootin bootable USB guide
Prepare a disposable USB device, select a verified image, write it with a clear target check and confirm the boot path before relying on the media.
Before you start
- Prepare a USB device whose existing contents are backed up or disposable.
- Obtain an image that matches the target CPU architecture and boot mode.
- Keep a second recovery route in case the test machine cannot boot the media.
Installation steps
- 01
Identify the target device
Insert the USB device, compare its capacity and label with the system's device list and close any file manager window that may still be writing to it.
- 02
Select and write the image
Choose the image source, select only the verified USB target and start the write operation after checking the warning about overwriting existing data.
- 03
Test the boot menu
Safely eject the device, restart a test computer, choose the matching USB boot entry and record whether the live environment or installer reaches its first screen.
Quick start
- 01
Check persistence expectations
Determine whether the selected image and workflow support persistent storage; treat a live session as temporary until a separate persistence test succeeds.
- 02
Record the boot mode
Note whether the machine used UEFI or legacy compatibility mode, since a media result that starts in one mode may not start in the other.
- 03
Recreate after a failed test
Recheck the image, target device and checksum, then rewrite the media instead of repeatedly changing firmware settings without a clear hypothesis.
Usage tips
- Never select a disk based only on its position in a list; verify size and label every time.
- Keep the original image and checksum record so a failed boot can be reproduced and diagnosed.
- Use separate rescue media for critical systems and label each device with its image and review date.
Troubleshooting and uninstall
Why does the computer skip the USB during startup?
Check that the device was ejected cleanly, the firmware boot mode matches the image, and the one-time boot menu lists the correct USB entry before recreating the media.
Why does the live system start but not save changes?
A live image may be intentionally stateless. Verify the image and persistence method, then test the storage area separately instead of assuming every live session is persistent.
- Preserve the image recordSave the image name, checksum and boot-test result before removing the writer so the media can be recreated later.
- Remove the applicationUninstall UNetbootin through the operating system and remove its temporary files only after confirming that the USB media and recovery notes are complete.
Frequently asked questions
Does UNetbootin make a full clone of a hard disk?
No. It creates bootable removable media from a distribution entry or image; full disk cloning requires a separate imaging workflow.
Can the target USB keep its existing files?
Treat the target as disposable before writing. Back up its files first because the selected operation may replace its partition or boot contents.
Does the download require an extraction code?
The Quark entry does not require one; the four-character code for the Baidu entry is shown beside its download entry.