of=/dev/sdb: The -of (output file) is the critical parameter.

if=Downloads/: The -if (input file) option requires the path and name of the Linux ISO image you are using as the input file.

This gives an efficient read and write rate. 4 MB is a good choice because it gives decent throughput and it is an exact multiple of 4 KB, which is the blocksize of the ext4 filesystem.

bs=4M: The -bs (blocksize) option defines the size of each chunk that is read from the input file and wrote to the output device.

dd: The name of the command we're using.

sudo: You need to be a superuser to issue dd commands.

If you want to be able to save changes and data you need to create a bootable USB drive with persistent storage. Each time you boot into the Ubuntu from this USB drive it will be a fresh instance of Ubuntu. To be clear, this bootable USB drive will boot into a working copy of Ubuntu Linux but it will not save any changes you make. You will require an Ubuntu installation ISO image to create the bootable USB drive, so make sure you have downloaded the version of Ubuntu you wish to use. When you are ready to install Ubuntu, you can use the USB drive as the installation medium. It allows you to try out the popular Unix-like operating system without making changes to the computer.

A bootable USB drive provides the same experience to the user as an Ubuntu Live DVD. Whichever method you choose, you'll need the Linux distribution's ISO file.įor example, Ubuntu Linux has two built-in methods for creating a bootable USB drive. You can also use the dd command to do this from a terminal on any Linux distro.

There are two ways to do this: Some Linux distributions include a graphical USB startup disk creator tool that will do it for you.

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