https://helpdeskgeek.com/linux-tips/what-are-inodes-in-linux-and-how-are-they-used/

https://premaseem.wordpress.com/2016/02/14/what-is-inode-in-linux-unit/

The inode contains all the administrative data needed to read a file, metadata.

The top part of the hierarchy is the file system itself. Within the file system are the file names. The file names link to the inodes. The inodes link to the physical data.