Shell Programming and Scripting

# cat host
150.150.102.10
150.150.105.10
150.150.106.10
150.150.150.150
# cat pn
while read hostname
do
PL=$(ping -c 10 $hostname | grep "% packet" | awk '{gsub("%","",$0);print $7}')
 if [[ $PL -gt 50 ]]
  then
  echo "$hostname is not pinging" >> status
  else
   echo "$hostname is pinging" >> status
  fi
done < host
# cat status
150.150.102.10 is pinging
150.150.105.10 is not pinging
150.150.106.10 is pinging
150.150.150.150 is not pinging
#

bash-3.00$ uname -a
SunOS your_host 5.10 Generic_127111-11 sun4u sparc SUNW,Sun-Fire-V440
bash-3.00$ /usr/sbin/ping your_host
your_host is alive
bash-3.00$ echo $?
0
bash-3.00$ /usr/sbin/ping invalid_host
/usr/sbin/ping: unknown host invalid
bash-3.00$ echo $?
1
bash-3.00$

/usr/sbin/ping your_host >/dev/null 2>&1
status=$?
if [ "$status" -eq "0" ]; then
 echo "ping success"
else
 echo "ping failed"
fi