perldoc does not provide much of information.

Really? Did you study 

    perldoc -f open
    perldoc perlipc
    perldoc perlopentut

[download]

Most of it will be explained there.

To learn a lot about Unix, I'd suggest

Stevens: Advanced Programming in the UNIX Environment

Abigail

In reply to Re: pipe concepts by Abigail-II
in thread pipe concepts by itzMe

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