In this section, we'll discuss hier and man hier as a way of determining what your filesystem's different names mean.
When you look at your system, you might question why certain folders are named in the way they are:
$ ls
bin dev home lib64 mnt proc run srv tmp vagrant
boot etc lib media opt root sbin sys usr var
What's sbin or opt?
You might also be curious as to know why there's a folder called root when we're supposed to be in the root of the system, /:
[vagrant@localhost /]$ pwd
/
The filesystem hierarchy has the answers you want!