http://www.thegeekstuff.com/2009/09/multitail-to-view-tail-f-output-of-multiple-log-files-in-one-terminal/

$ vi multi-tail.sh
#!/bin/sh

# When this exits, exit all back ground process also.
trap 'kill $(jobs -p)' EXIT

# iterate through the each given file names,
for file in "$@"
do
	# show tails of each in background.
	tail -f $file &
done

# wait .. until CTRL+C
wait