ref. manual for Linux

Comerades,

Can anyone direct me on where to get any reference manual on Linux? I
am aware any unix book could be helpful but I am particularly
interested in knowing more about Linux and its capabilities. Running
DOS and DOS APPLICATIONS in Linux are things that I also want to
explore. Any useful info on where to get such documentation will be
much appreciated. Thanks in advance.

eugene
            e-mail: agyei@net2.eos.uoguelph.ca