Look e.g. onto the BSD's family:
FreeBSD Handbook: http://www.freebsd.org/doc/en/books/developers-handbook/debugging.html
OpenBSD FAQ, nearby FreeBSD's Handbook: http://www.openbsd.org/faq/index.html
I'm really discouraged what can be called official Linux documentation. Information scattered around the network. Where is the core?
Is it
ii linux-doc 3.11.0-14.21 all Linux kernel specific documentation for version 3.11.0
of my Ubuntu?
Documentation
in the kernel tree. As of user space, there are many books out there. You can try this one for beginning: http://debian-handbook.info/ – yegorich Dec 23 '13 at 07:27