openssl-cli-notes.md
Connect to TLS endpoint w/SNI
echo | openssl s_client -connect $site:$port -servername $site
Show certificate expiration dates
echo | openssl s_client -connect $site:$port -servername $site 2>/dev/null | openssl x509 -noout -dates
Show all certificate info
echo | openssl s_client -connect $site:$port -servername $site 2>/dev/null | openssl x509 -noout -text