How to determine SSL cert expiration date from a PEM encoded certificate?

Question

If I have the actual file and a Bash shell in Mac or Linux, how can I query the cert file for when it will expire? Not a web site, but actually the certificate file itself,

Answer 1

I have made a bash script related to the same to check if the certificate is expired or not. You can use the same if required.

Script

https://github.com/zeeshanjamal16/usefulScripts/blob/master/sslCertificateExpireCheck.sh

ReadMe

https://github.com/zeeshanjamal16/usefulScripts/blob/master/README.md