OT: merge two files

[Kent West]

I want to merge the contents of one file with the bottom X lines of 
another. This works:

cat file1 > EndResultFile && tail +20 file2 >> EndResultFile
Is this adequate, or is there a better way to do it?
(Sorry I'm asking a programming question on Debian-User, but you folks 
are sharp, and I get confused with such things as piping and 
redirection, etc.)

Thanks!
--
Kent

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