How to Multiboot From USB With Multiple ISO Files

A normal bootable USB usually contains one installer or live environment. Rewriting the drive every time you need another ISO wastes time, especially when you regularly test Linux distributions or carry recovery media.

Ventoy solves this by turning the USB drive into a boot menu. You install Ventoy once, copy ISO files to its data partition, and choose which image to start when the machine boots. Adding or removing an image later is usually just a file operation.

Before you begin: back up the USB

Installing Ventoy erases and repartitions the selected drive. Disconnect other removable drives if that helps avoid selecting the wrong device, and copy anything you need to another location first. Do not rely on recognizing a drive only by its letter or /dev/sdX name; check its capacity and model as well.

An Update operation is intended to upgrade Ventoy without recreating the stored ISO files, but a backup is still sensible. Storage failures and human mistakes do not care whether an operation is normally non-destructive.

You need:

• A USB drive with enough space for Ventoy, your ISOs, and any other files.
• ISO images downloaded from their official operating-system or project sites.
• The official Ventoy release for your computer, from ventoy.net or its linked GitHub releases page.

Older tutorials often link to a fixed Ventoy version. Prefer the current signed or officially published release rather than reusing an abandoned download link.

Verify the ISO downloads

A corrupt or tampered image can fail to boot or install a compromised system. Compare each ISO's checksum with the value published by the operating-system vendor.

On Linux:

sha256sum ~/Downloads/example-distro.iso

On Windows PowerShell:

Get-FileHash .\example-distro.iso -Algorithm SHA256

Compare the complete hash character for character with the official download page. A matching checksum verifies integrity against that published value; it is still important that both the ISO and checksum came from the legitimate vendor.

Install Ventoy on the USB drive

Download and extract the Ventoy package, then connect the USB drive. On Windows, run Ventoy2Disk.exe from the extracted folder with the required administrator permission. Ventoy provides a corresponding Linux installation script and documentation for Linux users.

Confirm the selected device one more time, then choose Install for a new setup. Read the warning and proceed only if the drive has been backed up. When installation finishes, the drive normally has a small boot component and a large data partition that you can browse in your file manager.

Use Update only when upgrading an existing Ventoy installation. Use Install when deliberately creating a new one; the data-erasure consequences are different.

Copy and organize your ISO files

Open the Ventoy data partition and copy the ISO files onto it. You can create folders to separate Linux installers, recovery tools, and other images. Wait for every copy to finish, then safely eject or unmount the drive before unplugging it.

To add another operating system later, copy another ISO. To remove one, delete its ISO after confirming you no longer need it. There is normally no need to repeat the installation process for either operation.

Ventoy supports a large and tested collection of images, but “any ISO” is not a guarantee. Check the project's compatibility list when something does not boot. Some images require special boot options, updated firmware, or a newer Ventoy release.

Boot a computer from the USB

Connect the drive to the target computer and open its temporary boot menu while powering it on. Common keys include F12, F11, Esc, and F8, but the correct key varies by manufacturer. If no USB entry appears, check firmware settings and confirm that the machine supports booting from removable media.

Select the USB entry, then choose an ISO from the Ventoy menu. Many machines can boot in UEFI mode, while older hardware may use legacy BIOS/CSM mode. Use the mode required by the operating system and existing installation; mixing modes can complicate a dual-boot setup.

Secure Boot behavior varies by Ventoy version, distribution, and firmware. Follow Ventoy's documented key-enrollment process when required rather than randomly changing security settings. A Linux live environment is a safe way to test the USB before attempting an installation.

Ventoy versus writing an ISO with dd

Tools such as dd, Rufus in raw-image mode, or balenaEtcher write one image directly to a device. That is useful for a single installer, but it does not create a browseable collection of ISOs:

# Example only — a wrong of= device can destroy the wrong disk.
sudo dd if=example.iso of=/dev/sdX bs=4M status=progress conv=fsync

Do not run that example without replacing /dev/sdX with the carefully verified target. For a multiboot library, Ventoy is usually more convenient. For a vendor that explicitly requires direct image writing, follow the vendor's instructions instead.

Common problems

• The ISO appears in the menu but fails to start: verify its checksum, update Ventoy, and check the compatibility notes.
• The computer ignores the USB: try another USB port, confirm the boot-menu key, and inspect UEFI/legacy boot settings.
• The copied file is incomplete: compare file sizes and hashes, and always wait for writes to finish before ejecting.
• You need persistent changes in a live system: a normal ISO boots with its designed persistence behavior. Ventoy persistence plugins are image-specific and are not automatic for every distribution.
• The wrong drive was formatted: stop writing to it immediately. Recovery may be impossible, which is why device verification and backups matter.

Once the drive is ready, test every important image before an emergency. A multiboot USB is most useful when you already know that its menu, keyboard, network drivers, and recovery tools work on the hardware in front of you.