Continue a bash script

Question

After the success view of the host ( IPs ) I need to ping them in order to check if they are up. SIDS file contains 2 columns with hostnames. Are there any suggestions on how to Iimprove the code below?

#!/bin/bash
LINES=`cat /home/marko/SIDS | sed "s!/!-!g" | wc -l`

for (( i=1; i<=${LINES}; i++))
do
  FIRSTIP=CPE-`sed -n "${i}{p;q}" /home/marko/SIDS | awk '{print $1}'| sed "s!/!-!g"`
  SECONDIP=CPE-`sed -n "${i}{p;q}" /home/marko/SIDS | awk '{print $2}'| sed "s!/!-!g"`
  COUNT=$( host ${FIRSTIP} | grep address | wc -l )
  if [ $COUNT -gt 0 ]
  then
    echo success
  else
    echo ${SECONDIP}
  fi
done

Answer 1

You can just use dig , to avoid searching the output of host :

IP=$(dig +short $SERVERNAME)

Then to check, if the host is alive:

if ping -q -c $IP >/dev/null 2>&1
then
    echo "OK"
fi