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I have two questions I am struggling with...

How do the programs p1, p2, and p3 need to handle their standard files so they can work like this: p1 | p2 | p3 ?

What exactly is this command...

1) Can a script be made to ignore all signals.

2) Does the parent process always picks up the exit status of its children.

3) Can one program give rise to multiple processes.

4) Is a file...