This is part of the Semicolon&Sons Code Diary - consisting of lessons learned on the job. You're in the unix category.
Last Updated: 2025-10-31
Using a lab's SFTP connection, I tried to delete ./out/test using
 methods like rm. This failed and returned false without any debugging info. 
I assumed this was a permissions thing.
In actuality, the issue was silly and blameable on a terrible UI: out/test
 was a folder, not a file.  The UI didn't distinguish
Thus rmdir worked.