host connectivity check using Linux scripts using exit code

cat connect_check.sh

#!/bin/bash

HOST="google.com"

ping -c 4 $HOST

if [ "$?" -eq "1" ]                        #exit code test condition

then

echo " $HOST is reachable "

else

echo " $HOST unreachable "

fi

Output

./connect_check.sh

PING google.com (172.217.17.78) 56(84) bytes of data.

From 10.188.34.2 icmp_seq=1 Destination Host Unreachable

From 10.188.34.2 icmp_seq=2 Destination Host Unreachable

From 10.188.34.2 icmp_seq=3 Destination Host Unreachable

From 10.188.34.2 icmp_seq=4 Destination Host Unreachable

--- google.com ping statistics ---

4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 2998ms

 google.com is reachable