joining 2 files together ?

[beni]

Hi,

I am trying to find the equivalent for the old dos "copy file1+file2" command
("copy myfile1.txt+myfile2.txt" copies the contents in myfile2.txt and 
combines it with the contents in myfile1.txt).
But the standard freebsd "cp" doesn't seem to want the "+" between the two 
files :

bsdaddict# cp file1.avi+file2.avi
usage: cp [-R [-H | -L | -P]] [-f | -i | -n] [-alpv] source_file target_file
       cp [-R [-H | -L | -P]] [-f | -i | -n] [-alpv] source_file ... 
target_directory
bsdaddict#    

So how to I append file2 at the end of file1 to get only one file ? To be more 
specific : I would like to merge 2 avi files into one. How do I get 
file1.avi+file2.avi into file3.avi ?
Thanks.
-- 
Beni.