gistfile1.txt

cat top-1m.csv | sed -e 's_.*,\(.*\)_echo | openssl s\_client -connect \1:443 > certs/\1.pem\&_' > certs.sh
bash certs.sh
ls certs | xargs -L1 -I DOMAIN echo 'openssl x509 -in certs/DOMAIN -text -noout > checks/DOMAIN.check' > checks.sh
bash checks.sh
cat top-1m.csv | sed -e 's#.*,\(.*\)#\1#'| xargs -n1 -P20 -I DOM grep -H 'Not After' checks/DOM.pem.check 2>/dev/null | cut -d ':' -f 1,3-|sed -e 's_checks/\(.*\).pem.check: \(.*\)_\1,\2_' > top-1m-expiry.csv