I am interested to learn about real-world examples or cases of process-to-process interaction (IPC) that we encounter daily (that occur under the hood or otherwise) when using our laptop / desktop. I always read about it theoretically from a textbook.
For instance:
Between the parent process and child processes: one example of this on Linux I know when the shell starts other processes, and we can kill these processes using their process identifiers.
Between two unrelated (in the hierarchy), but interacting processes?
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