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Create a Bootable USB in Ubuntu Linux

Richard
Written by
Richard
Sep 3, 2022 Updated Aug 13, 2026 2 min read
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A bootable USB in Ubuntu Linux is a standard flash drive that lets you install or fix an operating system on a PC. Startup Disk Creator is a free tool built into Ubuntu that copies an ISO file (a complete disk image) onto your flash drive so your computer can boot straight from it.

You need a USB drive with at least 2GB of space to hold the files. Back up any important data on the drive first because the tool erases everything on it.

⚡ Quick Answer

Open Startup Disk Creator from the Activities search bar . Select your Ubuntu ISO file and the target USB drive, then click “Make Startup Disk” and confirm to create the bootable drive.

How to create a startup disk in Ubuntu Linux

Creating a bootable USB drive, called a startup disk, in Ubuntu Linux uses the Startup Disk Creator tool. This tool builds a startup disk from an Ubuntu ISO file, which is useful for installing or testing Ubuntu on another computer.

This guide assumes that an Ubuntu ISO image is already downloaded.

Follow these steps to turn an Ubuntu ISO image into a startup disk.

Open Startup Disk Creator using the Activities search bar .

Ubuntu Startup Disk Creator application window interface
ubuntu linux startup disk creator

The app usually selects your ISO image automatically if it sits alone inside the Download folder. Otherwise, select the correct ISO image manually.

Connecting a single USB drive causes Startup Disk Creator to select it automatically. Multiple connected drives require picking the correct target from the list.

Click Make Startup Disk.

Startup Disk Creator Make button to create bootable USB
ubuntu startup disk creator make disk

Click Yes to confirm. The process takes ten minutes or less.

Ubuntu startup disk creation process in progress on USB
ubuntu startup disk creation

When the "Installation Complete" window opens, click Quit.

Unplug the USB flash drive and boot the target computer from it. A successful boot means Ubuntu Linux is ready for installation.

That completes the process.

Conclusion:

  • Creating a startup disk in Ubuntu Linux is essential for system recovery and installation.
  • Ensure the USB flash drive has sufficient storage capacity and no valuable data before creating a startup disk.
  • The Startup Disk Creator tool simplifies creating a bootable disk from an Ubuntu ISO image.
  • After following the steps, users can boot their computers from the startup disk to install or repair Ubuntu Linux.

Can I use Rufus to make a bootable USB for Ubuntu?

Rufus detects the drive instantly. Format a drive with 8 gigabytes of storage or more, ensuring you back up any important files first.

How do I create a bootable USB stick in Linux?

In Linux Mint Right-click the ISO file and select Make Bootable USB Stick, or launch Menu ‣ Accessories ‣ USB Image Writer. Select your USB device and click Write.

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Richard

About the Author

Richard

Tech Writer, IT Professional

Richard, a writer for Geek Rewind, is a tech enthusiast who loves breaking down complex IT topics into simple, easy-to-understand ideas. With years of hands-on experience in system administration and enterprise IT operations, he’s developed a knack for offering practical tips and solutions. Richard aims to make technology more accessible and actionable. He's deeply committed to the Geek Rewind community, always ready to answer questions and engage in discussions.

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