File manipulation ?

[Bob Goodwin]

Can someone tell me how to combine a number of
text files into one file?

I have about fifty open office [.odt] text files
that I would like to combine into one file containing
all of that text.  Nothing I have tried is acceptable
to open office?

I am running updated FC5 and have been trying to do
this from the command line, then opening the result
in open office.

Bob Goodwin