Usefull blogs

http://www.bogotobogo.com/cplusplus/multithreading_ipc.php

http://hzqtc.github.io/2012/07/linux-ipc-with-pipes.html

http://www.bogotobogo.com/cplusplus/quiz_multithreading.php

http://stackoverflow.com/questions/860339/difference-between-private-public-and-protected-inheritance

https://computing.llnl.gov/tutorials/pthreads/#Thread  (Very good Posix thread programing)