Shell Programming and Scripting

#!/bin/bash -xv

 
#! /bin/bash
cat "./Myfile" > input
file="input"
sed -i".backup" 's/^#.*$//' $file
sed -i '/^[[:space:]]*$/d' $file
awk '{for(i=2;i<=NF;i++)print $1,$i}' $file  > temp
mv temp $file
while read ip host
do
(( idx++ ))
HOST[$idx]="$host"
IP[$idx]="$ip"
if [ $(ping -q -c 1 -t 1 "$host" |grep PING | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}') = "$ip" ]
 then 
  echo "$name PINGS">>pingresults.txt
  else 
  echo "$name doesnot PINGS">>pingresults.txt
 fi
   
done < $file

"[: -lt: unary operator expected"

 
if [ $(ping -q -c 1 -t 1 "$host" |grep PING | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}') = "$ip" ]

if [ "$(ping -q -c 1 -t 1 "$host" |grep PING | grep -Eo '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}')" = "$ip" ]