Display Cert

openssl x509 -in cert.pem -noout -text

Display Cert Fingerprint

openssl x509 -in jabber.pem -noout -fingerprint -sha1

Fetch Cert

openssl s_client -showcerts -connect server:port

Digests Calculation

openssl dgst -md5 <filename>
openssl dgst -sha1 <filename>
openssl dgst -rmd160 <filename>