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问题背景：

重启 SSL nginx报错：

root@developer:~# service nginx restart 
Restarting nginx: nginx: [emerg] SSL_CTX_use_PrivateKey_file("/etc/nginx/conf.d/ssl/ssl.key") failed 
(SSL: error:0B080074:x509 certificate routines:X509_check_private_key:key values mismatch) 
nginx: configuration file /etc/nginx/nginx.conf test failed 

问题原因：

SSL证书和SSL私钥不匹配


it has a mismatch between your key and certificate 

解决方法：

重新生成SSL证书配置即可

相关技巧：

借助如下两个命令就可以检验SSL 证书 和 SSL 私钥是否一致：

Check an MD5 hash of the public key to ensure that it matches with what is in a private key：
openssl x509 -noout -modulus -in certificate.crt | openssl md5
openssl rsa  -noout -modulus -in privateKey.key  | openssl md5