To check out the remote SSL certifiate of a remote server:

openssl s_client -connect smc-elvis-dev.bp.adnovum.hu:10091
openssl s_client -showcerts -connect smc-elvis-dev.bp.adnovum.hu:10091 

To check out the content of a PEM file with a certificate:

openssl x509 -in aaa_cert.pem -noout -text
openssl x509 -in aaa_cert.pem -sha1 -noou -fingerprint
openssl x509 -in aaa_cert.pem -sha1 -noout -issuer