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Dual Boot Best Practices?
(kbin.social)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
LiveUSB means a usb stick from which you can boot linux temporarily (in case of Ubuntu LiveUSB, the option says something like "try Ubuntu before installing") and which also provides you an option to install/reinstall the OS.
You can boot from a USB like that and still access and manipulate files on your SSD/HDD.
No hard requirement for it to be the same distro that you have installed, just convenient in case you want to reinstall.