http://stackoverflow.com/a/25031230/874188

babian$ while read -r file fields; do
> printf "%s" "$fields" >"$file"
> done <<HERE
> one_file.txt abc | def
> two_file.txt ghi | jkl
> three_file.txt mno | pqr
> four_WORD.txt xyz | xyz
> HERE
babian$ cat *file.txt
abc | defmno | pqrghi | jklbabian$ for f in *_file.txt; do (cat "${f}") >> full_set.txt; done
babian$ cat full_set.txt
abc | defmno | pqrghi | jklbabian$ sed '' *file.txt
abc | def
mno | pqr
ghi | jklbabian$