/Shell/Bash/Check if internet is available shell script

Check if internet is available shell script

test=google.com
if nc -zw1 $test 443 && echo |openssl s_client -connect $test:443 2>&1 |awk '
  handshake && $1 == "Verification" { if ($2=="OK") exit; exit 1 }
  $1 $2 == "SSLhandshake" { handshake = 1 }'
then
  echo "we have connectivity"
fi

Source: unix.stackexchange.com

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