Autoconf Tutorial - Introduction to programming using GNU's autoconf system. Autoconf simplifies the porting process and provides a consistent build interface for system administrators.
IP Filter - TCP/IP Packet Filtering package
Serial Programming Guide for POSIX Operating Systems - Programming serial ports in Unix.
UNIX and Programming Section - Tutorials and manuals for Java and PHP.
Unix programming resources and examples - Annotated source code examples for most Unix system and library calls. Plus working source code examples of some classic algorithms.
Wildcard Pattern Matching - C routine to check whether a string matches a unix wildcard. '*', '?', sets of characters, and negated sets of characters are supported.
