Unless you're using Linux on a virtual machine, installing the open-source OS is usually done via a USB drive. Because of this, you can burn an ISO to a USB drive, reboot the system, boot into the USB ...

However, if you put a portable Linux installation on a flash drive, you can carry your own operating system with you wherever ...

Sure, using the Linux command line is optional. But these are commands I rely on every day, and you can benefit from them, too.

Whatever the case, a portable Linux installation on a flash drive can be used in place of a normal storage drive in your PC.