>TUTORIAL: Example of a Linux Installation using Pop!_OS

Pop!_OS is a popular Linux distro developed by System76. It can be run from a computer's hard-drive, or from external memory such as a USB drive.

Pop!_OS Live Disk Install
You can run a full version of Pop!_OS from a USB drive (thumb drive, flash drive, or USB stick) in what's known as a live environment. Using a live disk, you can boot Linux from a USB drive while leaving another operating system on the computer's hard-drive, so that you can test using Linux before permanently replacing the operating system on the computer. An install overview is listed below, and a more detailed version can be found here... https://support.system76.com/articles/live-disk

Downloading the ISO
In order to install Pop!_OS, you must first download the .iso image. This is a disk image with the operating system and installer on it. You can download Pop!_OS here.

Verifying the Download
Verifying your download is an important step: the system generates a "checksum" for Pop!_OS images and recommend that you verify that your download matches that checksum before trying to install. This ensures that you've received the full, complete download and that it is not corrupted.

Making the Bootable Drive
In order to make the bootable live disk, you must have a flash drive and software to write the Pop!_OS .iso image to the drive. There's a variety of applications you can use to write disk images to a flash drive, including Etcher. Etcher is an open source app for Windows, macOS, and Linux that allows you to burn disk images to USB drives. You can download it at balena.io/etcher/.

Booting From the Live Disk
After creating the live disk, insert the USB drive into your computer, then reboot or power up your system. You'll need to tell the computer to boot from the live disk by pressing a key right as you power up the computer, in order to see the BIOS boot device selection menu.

more install details... https://support.system76.com/articles/live-disk