Recently I tried to move a directory that I own to another directory (which I also own), but I couldn't. I then noticed that I don't own the parent directory.
This made me wonder what are the rules for moving a directory in UNIX. Do you need to have read/write permissions to both it and its parent? Also what happens if it contains files or directories that you don't own?
Linux Usr System Directory – Ls (List Directory) Command Examples – Quick Tips
By Clyde E. Boom
The Linux usr Directory
The usr directory, below the /, typically contains application software programs and utilities that can be shared across a network.