A long standing tradition among the OpenBSD community, Reading The Fine Man Pages, (there are alternative expansions), OpenBSD's documentation is excellent, and often questions are easily answered between

# apropos keyword
# man -k keyword

and reading the relevant man pages. OpenBSD prides itself on quality documentation included in the system, "A bug in the documentation is a bug", is a paradigm that could benefit software development as a whole.
If you don't have OpenBSD, you can read online man pages here.