interesting-bash-prob

#!/usr/bin/env bash

FILE=$(realpath ~/.ssh/config)

THEPORT=""
THEHOST=""
THEADDR=""

while read -r name
do
	echo "DBG: $name"
	KEY=$(echo "$name" | cut -d ' ' -f1)
	VALUE=$(echo "$name" | cut -d ' ' -f2)

	if [ "$KEY" == "Host" ]; then
		THEHOST=""
		THEPORT=""
		THEADDR=""
		THEHOST="$VALUE"
	fi

	if [  "$KEY" == "HostName" ]; then
		THEADDR="$VALUE"
	fi

	if [  "$KEY" == "Port" ]; then
		THEPORT="$VALUE"
	fi

	if [[ -n "$THEADDR" && -n "$THEPORT" ]]; then
		echo "Checking $THEHOST"
		nc "$THEADDR" "$THEPORT" -w 1
		echo "$? returned by nc $THEADDR $THEPORT -w 1"
	fi

done < "$FILE"

echo "Exited"