Ethcher: A few years ago, the creation of one bootable USB it was not so easy. Years ago, CDs / DVDs were the main method of distributing operating systems.
If you bought a new computer you would always have an 'installation disk', or if it did not exist you could create it from the operating system.
Since then, however, things have changed and you can download any operating software online and easily create a bootable USB for any system you are interested in. Provided you have the right application to do it.
To create a bootable USB you need a disk image or ISO. ISO is basically a file that contains data that can be written to an optical disc such as a CD or DVD. It's basically an installation tray.
For Windows 10, you can download the ISO image through the Microsoft Media Builder. For all Linux distributions, you can download the ISO you are interested in from the official distribution page. You will only encounter problems if you are trying to find some ISO for macOS operating because they are not readily available. For these ISOs you may have to search for torrents.
Let's create the USB
Some operating systems, such as macOS, come with utilities for writing a disk image to a USB, but not yet. The MacOS utility is a bit complicated especially if you are a beginner.
Today we will try something simpler.
The Ethcher tool is available for Windows, Linux, and MacOS. All you need is the ISO file and a USB. The application will take care of everything else in three simple steps.
After the (easy) creation of bootable USB, you can use it to start your computer from USB and not from your operating system. In some cases, you may need to change the boot order from your computer's BIOS so that it first reads USB instead of your hard drive.