One-liner: how to check the SSL certificate expiration of several servers

for i in cnn.com bbc.co.uk
do
  exp=`echo | openssl s_client -connect $i:443  2>/dev/null | 
  openssl x509 -noout -dates | fgrep notAfter | sed -e 's/^.*=//'`
  echo "$i        $exp"
done

cnn.com	    Feb  6 12:00:00 2018 GMT
bbc.co.uk   Apr 20 10:01:10 2017 GMT

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