pptp чекер

LOG="/var/log/pptp-run.log"
PID="/var/run/ppp0.pid"

while true; do
echo -e "\n========================\n`date`" >> $LOG
if [ -f $PID ]; then
echo "ok" >> /dev/null
else
/usr/sbin/pptp 192.168.55.41 >> $LOG
fi
sleep 30s;
done