OPENSSL Save x509 certificate of a website
Solution 1:
try
echo "" | openssl s_client -host {HOST} -port 443 | sed -ne '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > cert.pem
then to get all certs in chain , a quick way could be
echo "" | openssl s_client -host {HOST} -port 443 -showcerts | awk '/BEGIN CERT/ {p=1} ; p==1; /END CERT/ {p=0}' > allcerts.pem