Considering that you are already familiar with exploring the file system, there is one type of file that we did not covered yet. This files are the File links.
ls -l /usr/bin
So, a short explanation it will be that are an important feature of working with files on Linux. A link is a reference to a file in a different place - so basically a "shortcut".
There are two kind of links:
Hard Links -> shows as regular file
Soft (Symbolic) Links -> shows as "shortcut"
Considering having a file name mydata.txt this file is stored on the disc in a series of data blocks. And the location of thoese are stored in a structure called inode. And at the end the file system associates the name of the file in its index of file with the data in that inode.
So as a pratice I created the file mydata.txt and inside I wrote a few names. In case I would like to access this document from my documents directory, as well as from my home directory,