commands for operating systems

Commands for what? Some are the same (cd) but most are different (ls, mv, cp). Pick up a Linux for ... or Teach yourself book and read. get a distro install it and use the man pages.

More specific questions yeld more specific answers.

Linux has various documents online created and maintained by volunteers. Before you go out and spend money on a book look at the FREE documentation that is available online at the linux documentation project. The web address is http://www.linuxdoc.org/. By the way the Linux for Dummys book is not a very good book for beginers at all. It is barely a HOWTO book on installing RedHat 6.1. Personally I would try the free stuff then once you have a general idea of what you need to know then go out and get a book. Several good books come with distributions included. For beginers Mandrake 7.2 or SuSE 7.0 are excellent distros.

Hope this helps

Hmm... I didn't understand you clearly, but I'll try to help...

If you looking for the way to "feel Linux, but do not set it up", try Cygwin package (it requires win32 environment) available at http://sourceware.cygnus.com/cygwin. I provides complete GNU environment with shell interpreter, most useful commands and development tools.

If you using XX-DOS, I can't help you...

The following site might help you - it lists commands for "how do I do x" for different Unix operating systems.

http://home.earthlink.net/~bhami/rosetta.html

William