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1 Answer Sorted by: 6 Are lock, mutex, and semaphore for between threads or between processes? You'll find examples of locking primitives for both situations. For example, pthread mutexes are used for mutual exclusion between threads of the same process. On the other hand, System V IPC ( man svipc) semaphores can be used across processes. 28 oct. 2024 · Tutorial File Locking in Linux File locking in Linux is the solution by which you can ensure that the file for reading/writing is going to be handled safely. Oct 28, 2024 — Sagar Sharma File Locking in Linux Nope, this is not about password-protecting your files.