openssl s_client -connect 10.150.232.96:443 -showcerts

#show dates

openssl s_client -connect 10.240.89.254:3041 | openssl x509 -noout -dates

notBefore=Oct 10 20:04:26 2015 GMT

notAfter=Oct  9 20:04:26 2017 GMT

openssl s_client -connect 10.240.89.254:3041 | openssl x509 -noout -issuer

openssl s_client -connect 10.240.89.254:3041 | openssl x509

#nearly all details

openssl s_client -connect 10.240.89.254:3041 | openssl x509 -noout -text

https://www.shellhacks.com/openssl-check-ssl-certificate-expiration-date/