echo $(<filename)
Code: $ printf "%s\n" 1 2 3 4 5 > filename $ echo $(<filename) $ echo $(cat < filename) 1 2 3 4 5 $
$ printf "%s\n" 1 2 3 4 5 > filename $ echo $(<filename) $ echo $(cat < filename) 1 2 3 4 5 $