check-ssl-certificate-expiry-date.md

Check SSL Certificate Expiry Date

Category: Security

You can print the expiry date for an SSL certificate from the command line. For example, the following will inspect the SSL certificate for facebook.com:

echo | openssl s_client -showcerts -connect facebook.com:443 2>/dev/null | openssl x509 -inform pem -noout -dates

Output:

notBefore=Dec 22 00:00:00 2020 GMT
notAfter=Mar 21 23:59:59 2021 GMT

The value for notAfter is the SSL certificate expiry date.