remote backup script via ssh, new version

#!/bin/bash -x

SITE=$1
if [ -z "$SITE" ]
  then
    echo "no site supplied"
    exit
fi
echo SITE IS $SITE
ACCOUNT=root@$SITE
COMMAND="/bin/tar czf - /home "
BACKUP_FOLDER=~/backup
DATE=`date +%Y-%m-%d_%H-%M-%S`
echo DATE IS $DATE
DESTINATION=$BACKUP_FOLDER/$SITE/home_$DATE.tar.gz
mkdir -p $BACKUP_FOLDER/$SITE/

/usr/bin/ssh $ACCOUNT $COMMAND > $DESTINATION 

echo DONE