Sorry, I am new to Linux programming so I just have a few questions.

I have seen a few examples lying around, some have:

"section '.text' executable "

Whilst others have:

"segment readable executable"

Is there any difference between the two or not (apart from the flags)?

Is there any decent programming reference for Linux with assembly; just to give the differences between that an Windows? I know there are a lot of interrupts like DOS etc.

Cheers, pal.

Not quite interrupts, syscalls moreso. The real difference is that the support for windows in fasm is much greater than support for linux. Most people here make object files and use LD to slap them together, which has advantages and disadvantages. There are linux examples in the examples section, but i'd recommend learning as if you've never programmed for a particular OS before. It's not as easy to compare them (especially if you're thinking about linux 64bit). Same general instructions are available, but it's much different from windows in the library perspective. Fortunately, you still have libc and things like gtk.

pal, the difference is that the first is for "format ELF" and the other for "format ELF executable". In the first case, once you have your ELF object ("format ELF") linked, you'll have your section located into a segment that will be readable and executable (like your second example).