[ParrotyError]

Back in the 90s (IIRC) someone wrote a kernel module for linux that provided the equivalent of a GUI "trash can/recycling bin" but at the filesystem level, where a specific directory (folder for you young 'uns) was set aside for the deleted files. Because it was a kernel module (filesystem driver) it was transparent to applications, including the shell.

[botw]

lost+found? it's still there in each file system but i never see a real usage for it.

[Crespyl]

I believe that's less an everyday-use "trashcan" and more of an ext* feature for recovering from filesystem corruption; "Something broke and I think I've recovered all the files, but I've forgotten where some of them were supposed to go".