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opensslコマンドでSSL証明書の有効期限を確認する

OpenSSL
SSL証明書

Posted at 2014-10-20

$ openssl s_client -connect example.com:443 < /dev/null 2> /dev/null | openssl x509 -text | grep Not
            Not Before: Sep 25 09:14:02 2014 GMT
            Not After : Oct 27 09:49:54 2017 GMT

Not Afterが有効期限

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