What is a good book for Programming in C++ for Unix/linux

[nikkoNIU]

I just started this in class. Things like programming in C++ to mess with files in a terminal(by using system calls like open()) or things like scripting. I am very lost and there is no book the teacher assigned. Does someone know a book or a link to a website that could help? Thanks

[S6k9GNh0]

The POSIX functions you are seemingly using are already extensively documented online e.g. http://pubs.opengroup.org/onlinepubs/009695399/functions/open.html

Try to pay attention in class and look at the reference when you don't understand a function.