Sorry, I was trying to be concise. I'll aim to be useful. I think the guide as it is, is not only old but incomplete and mostly points to man pages. It's saving grace is the examples, which could easily be taken from a code search.

The Stevens Unix network programming is a better source if you have it. Vendor documentation is often better too. Say you were interested in SYSV IPC:

http://www.ibiblio.org/pub/Linux/docs/LDP/programmers-guide/... http://www.advancedlinuxprogramming.com/alp-folder/alp-ch05-... http://developers.sun.com/solaris/articles/named_pipes.html http://www.ibm.com/developerworks/aix/library/au-ipc/

Working code like the APR is worth reading for portability issues, particularly with sockets. I'm sure there are many other examples.

Given all this would you really use this guide when writing code?