There are a bunch of tools that let you load an operating system onto a USB flash drive, allowing you to boot from that drive and either run or install the OS. But most of those tools are only ...
Your USB drive should be able to store and boot as many operating systems as its storage capacity allows.
Running Linux from a USB drive is possible. You can boot just about any distribution you want from USB. There are some things you should consider before going this route. I've used Linux in just about ...