2 questions: batch file + R 1.8 on Red-Hat 9.0

I can help with the first question:

I would like to know what is the format of an input command file when 
running R non interactively on a unix machine.

Put R commands just as you would enter on the command line, or in a file
that you would source() into somefile.R.  Then 

R --no-save --slave < somefile.R

Take a look at "man R" for some details on command line options.

HTH,

+ seth

PS: You'll need to provide some more info on your second question such
as how you are trying to install (from source or from binary) and what
specific errors you are encountering.

Second:

Is there anyone who had success installing R 1.8 on Red hat Linux 9.0. I am 
new to both Linux and R and I receive error message when installing it.