Linux makes this slightly easier for developers using the lsof (List Open Files) command. By running lsof | grep [filename] , you can instantly see which process has the file open.
: Thread A locks Resource 1 and wants Resource 2. Thread B locks Resource 2 and wants Resource 1. They both sit in silence forever, waiting for the other to move. Zombie Processes error resource is write-locked by another thread
When a program needs to modify a resource—be it a text file, a database entry, or a configuration setting—it must ensure data integrity. If Process A writes data to a file while Process B reads it at the exact same millisecond, Process B might end up reading corrupted or half-written data (a "dirty read"). If Process A and Process B both try to write to the file simultaneously, the file could become corrupted entirely. Linux makes this slightly easier for developers using
In modern computing, "multithreading" allows a program to do many things at once. However, when two or more threads try to access the same piece of data (the "resource") at the same time, chaos can ensue. To prevent data corruption, systems use . Thread B locks Resource 2 and wants Resource 1
Whenever possible, use immutable objects. If data can’t be changed, it doesn't need a write-lock.