Locking Executing Files: Windows does, Linux doesn't. Why?

Question

I noticed when a file is executed on Windows (.exe or .dll), it is locked and cannot be deleted, moved or modified.

Linux, on the other hand, does not lock executing

Answer 1

Executables are progressively mapped to memory when run. What that means is that portions of the executable are loaded as needed. If the file is swapped out prior to all sections being mapped, it could cause major instability.