$ cert github.com DomainName: github.com Issuer: DigiCert Inc NotBefore: 2016/03/10 09:00:00 NotAfter: 2018/05/17 21:00:00 CommonName: github.com SANs: [github.com www.github.com] $ cert github.com golang.org DomainName: github.com Issuer: DigiCert Inc NotBefore: 2016/03/10 09:00:00 NotAfter: 2018/05/17 21:00:00 CommonName: github.com SANs: [github.com www.github.com] DomainName: golang.org Issuer
![Goでcertというコマンドを作ってみた](https://cdn-ak-scissors.b.st-hatena.com/image/square/3430ac8dc6eaf5560d2fb2cdeab7ca0a66bd8d92/height=288;version=1;width=512/https%3A%2F%2Fgenkiroid.github.io%2Fassets%2Fimg%2Flogo.png)