pause-continue.sh

#!/bin/bash
# james shubin, agplv3+
# pause until key press and then continue
# https://ttboj.wordpress.com/2017/01/06/ten-minute-hacks-process-pause-resume

if [ ! "$#" -eq 1 ]; then
	echo "Usage: `basename $0` <process>"
	echo "Pauses process until key press and then continues!"
	exit 1
fi

echo "Stopping '$1'..."
killall -SIGSTOP "$1"
e=$?
if [ $e -ne 0 ]; then
	echo "Could not pause '$1', error '$e'."
	exit $e
fi

echo "[press any key to continue]"
#read -n1 -r -s -p "[press any key to continue]" key
read -n1 -r -s key
tput cuu 1 && tput el	# remove last line
echo "Continuing '$1'..."
#echo	# newline
killall -SIGCONT "$1"
exit $?

imho, you should use the procps pkill rather than killall