embedded linux newbie seeking any good books or tutorial...

Hi,
I'm new to embedded linux (completely clueless) and wanted to port one on MICROBLAZE core configured on FPGA...I wanted to know the right approach to learn embedded linux...and i had a few question regarding the same...
1) Should i learn about linux first...?
2) Does embedded linux differ from linux...if so to what extent...?
3) Do i need a detailed knowledge about the kernel and its functionality...?
4) I've just started using ubuntu 10.10(i'm using only the gui and got no idea about the CLI or any OS related stuff), i found a lot of folders for MICROBLAZE processor...and 2 files "kconfig" and a "make file"...can i use this as an embedded OS...?
5) As of my knowledge configuring a linux for a certain platform just needs some modification in the "kconfig" file...is that true...?


Can anyone please suggest me some good books or tutorial which starts from scratch...also it'd be helpful if any of these tutorial are based on FPGA platform(any softcore over FPGA) as i'm quite experienced with FPGA...any help is appreciated...


Regards,
Arthes

I suggest a review of the following website:

http://www.monstr.eu/wiki/doku.php

To answer your specific questions:

1) Probably a good idea
2) "linux" is really just the kernel, a "linux distribution" contains a lot more (filesystem, applications, UIs, etc). Embedded linux is generally stripped down to essentials.
3) Not too detailed, but it definitely helps to have a good foundation
4) Microblaze is a target architecture for the linux kernel, which certainly will make things easier for you, but there may be minimal to massive amounts of work depending on the device you're targeting
5) No, you have to use the correct toolchain (C library, compiler version) for the target board.

Good luck!