File locking is a crucial technique for ensuring data integrity in multi-process applications, particularly when multiple instances of the same program may attempt to read from or write to the same file concurrently. By implementing a file lock using the `syscall` package, applications can prevent race conditions and duplicate entries when accessing shared resources. This approach functions similarly to mutexes in concurrent programming, blocking subsequent processes until the lock is released. Effective use of file locks not only enhances reliability but also requires careful handling to avoid deadlocks. Overall, mastering file locking techniques in Go is essential for developing robust applications that maintain data consistency.