Reddit reviews TCP/IP Illustrated (3 Volume Set)

What OS? Linux, of course. When TPB order everything locked down, you don't want to be caught using a Microsoft OS. -- What distribution? The easy path is Ubuntu, with the Cinnamon UI, or LinuxMint 13, when issued (May 2012).

What IDE? There's lots to choose from. My favorite is "geany".

https://en.wikipedia.org/wiki/Geany

For TCP/IP protocol tutorial. Recently updated by Wright:
Stevens, "TCP/IP Illustrated", 3-volume set.

http://www.amazon.com/TCP-IP-Illustrated-Volume-Set/dp/0201776316

On human interface guidelines relevant to programming:

https://en.wikipedia.org/wiki/Human_interface_guidelines

For GNOME 2, see:

http://library.gnome.org/devel/hig-book/stable/

To develop Linux applications:

You are right. You MUST know how to program in C. When others tell you that object oriented programming is the thing, know that you can do object oriented programming in C. Avoid interpreted languages (Python, Java, and others) as a first programming language. Interpreted languages teach bad habits and hid too much of what's going on from you such that debugging becomes difficult to impossible.

However, if all you intend is "casual programming", the Python will do, if you must. It's just not the best choice first a first language if your intent is to become a "professional programmer". I use Python myself; It works for what I need to do quick and dirty.

Definitive, but for experienced programmers:

http://www.amazon.com/C-Programming-Language-2nd-Edition/dp/0131103628/ref=sr_1_1?s=books&ie=UTF8&qid=1335197606&sr=1-1

As a tutorial for someone learning a first programming language and how to program from zero:

Perry, "Absolute Beginner's Guide to C", 2ed.
-- I have not read the book, but the ToC looks reasonable for a beginner.

http://www.amazon.com/Absolute-Beginners-Guide-2nd-Edition/dp/0672305100/ref=sr_1_6?s=books&ie=UTF8&qid=1335197606&sr=1-6

OK, you don't want a full CS curriculum, but some topics in discrete mathematics are mandatory. ... Ack! Having looked over the offerings at Amazon, I believe that Epp, "Discrete Mathematics with Applications" may be the best of the lot, but at $187, it is hard to recommend without knowing your intent and interest. The reason I suggest this title is that it looks focused on application to computer science topics. It covers a number of topics that are NOT covered in many of the other titles, enough so that should you use other texts you will have spent more than the $187 that this title includes. JMHO.

http://www.amazon.com/Discrete-Mathematics-Applications-Susanna-Epp/dp/0495391328/ref=sr_1_1?s=books&ie=UTF8&qid=1335199316&sr=1-1

See also: Sedgwick, "Algorithms" -- You'll probably need it sooner than later.

http://www.amazon.com/Algorithms-4th-Edition-Robert-Sedgewick/dp/032157351X/ref=sr_1_1?s=books&ie=UTF8&qid=1335200153&sr=1-1

Remember that Linux OS? You are going to need some programming tools, right? If you intend to write GUI applications based on the GTK+ toolkit, then install the package "glade" or "glade-gtk". Installing a glade package will suck in over 100 other packages essential to building a GTK based GUI application. Specifying glade to the package manager is just easier that finding and installing all the other necessary parts by hand.

If you are going to do command line based UI programs, then package "build-essentials" should be adequate.

There are some other things to read:

On how to organize, grow and maintain a Linux software development project: Fogel, "Producing Open Source Software"

http://producingoss.com/

You can read it online here, but buy the book too to help support Fogel. He's gotta eat too.

On the culture of writing Open Source Software:

Raymond, "The Cathedral and the Bazaar"

http://www.catb.org/~esr/writings/cathedral-bazaar/

Linux programming is not like Windows programming.
Read and study ESR's TAOP.

Raymond, "The Art of Unix Programming"

http://www.catb.org/~esr/writings/taoup/html/

You can read it online, free. However, buy a hardcopy too. Raymond has to eat too.

Now to get really technical. What interface do you write to?

Kerrick, "The Linux Programming Interface: A Linux and UNIX System Programming Handbook"

http://www.amazon.com/The-Linux-Programming-Interface-Handbook/dp/1593272200/ref=sr_1_1?s=books&ie=UTF8&qid=1335201257&sr=1-1#reader_1593272200

Beginning to focus on GNU style programming:

GNU Coding Standards

https://www.gnu.org/prep/standards/

GNU Coding Standards is more than how to and how much to indent a line or how to set braces. You will get into the topic of Make and Autotools. Make is a program to build complex softare and Autotools is about how to build a package for distribution, the package that any Unix flavor can use; it is not focused on any specific distribution. See also: "configure and make"

Enough! There's more, but I have too much time in this already for today.

[edit: typos]

For howto stuff or newer topics, definitely. I have several fullsize bookcases that I almost haven't touched in over five years.

The only exception would be my copies of TCP/IP Illustrated by Stevens which I recently referred to in tracking down improper (and rarely encountered) behavior in Linux's network stack.