Mailing the story:
There’s a Lot in the Dot: Filesystem Permissions and Pathnames (Part 2)
Still deeper into the dot (.) with an dive into access permissions. Study up because there’s going to be a quiz. In the previous article we saw how the hidden directory entries named . (dot) and .. (dot dot) tie the filesystem together. Those names are hard links that reference the actual filesystem object through the index number. A directory always has at least two names: . and its given name. You can always reach the parent directory through the .. entry.