How can I see a certificate expiration with OpenSSL?
I have an SSL/TLS certificate and I would like to see when it expires.
Is there any way to see the expiration from command line (e.g. OpenSSL)?
You can use this command to display the certificate expiration:
$ openssl x509 -enddate -noout -in cert.pem
In case the certificate is stored in a format different from PEM, you first need to convert it. For example you can convert
.pem with this command:
$ openssl x509 -inform der -in cert.cer -out cert.pem