A good reference for understanding the Linux file system is the Wikipedia page on the Unix_filesystem.
/usr is where most of the user space programs and data reside
and once upon a time is where the user home directories lived, under
/dev is short for devices.
Your donation will support ongoing availability and give you access to the PDF version of this book. Desktop Survival Guides include Data Science, GNU/Linux, and MLHub. Books available on Amazon include Data Mining with Rattle and Essentials of Data Science. Popular open source software includes rattle, wajig, and mlhub. Hosted by Togaware, a pioneer of free and open source software since 1984. Copyright © 1995-2022 Graham.Williams@togaware.com Creative Commons Attribution-ShareAlike 4.0