OpenSSL命令如何从生成的证书文件中提取出公钥文件？

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 开发四年只会写业务代码，分布式高并发都不会还做程序员？->>>    已经生成用户证书 server.crt，如何从中提取出公钥文件？ $ openssl x509 -outform PEM -in server/server.crt -pubkey -out server/server.pubkey -----BEGIN PUBLIC KEY----- MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDYhJizzt4+zhLMTSjDk0rd6MlK xBYKIp972+Wc9KSpOs5LGQ+2802mlr6dSDWJJhJShArqOIKgxNE7ZBZYlGeDo4l6 Dm4DyVFpu62fObgk6vmU8T7nvF8Uo7sQdpfqgUjofGFgUDjB3fYgKUTp+kOj6RMh R3uttrZmOraF/rEUkQIDAQAB -----END PUBLIC KEY----- 可以显示公钥信息，手动将其中内容复制到一个文件中做公钥测试成功，但是此命令输出的文件内容不是公钥信息，内容如下： -----BEGIN CERTIFICATE----- MIICpTCCAg6gAwIBAgIBATANBgkqhkiG9w0BAQUFADBFMQswCQYDVQQGEwJjbjEQ MA4GA1UECBMHYmVpamluZzEMMAoGA1UEChMDYW9lMRYwFAYDVQQDEw13d3cuenlu ZXQubXRuMB4XDTEzMDYwMjAxMjIxNloXDTE0MDYwMjAxMjIxNlowbzELMAkGA1UE BhMCY24xEDAOBgNVBAgMB2JlaWppbmcxDDAKBgNVBAoMA0FPRTEPMA0GA1UEAwwG d2l6YXJkMQwwCgYDVQQLDANjb3AxITAfBgkqhkiG9w0BCQEWEnd6aGgxOTg4QGdt YWlsLmNvbTCBnzANBgkqhkiG9w0BAQEFAAOBjQAwgYkCgYEA2ISYs87ePs4SzE0o w5NK3ejJSsQWCiKfe9vlnPSkqTrOSxkPtvNNppa+nUg1iSYSUoQK6jiCoMTRO2QW WJRng6OJeg5uA8lRabutnzm4JOr5lPE+57xfFKO7EHaX6oFI6HxhYFA4wd32IClE 6fpDo+kTIUd7rba2Zjq2hf6xFJECAwEAAaN7MHkwCQYDVR0TBAIwADAsBglghkgB hvhCAQ0EHxYdT3BlblNTTCBHZW5lcmF0ZWQgQ2VydGlmaWNhdGUwHQYDVR0OBBYE FOhSP6PH+gt+PZjgIjhLGMMakFfMMB8GA1UdIwQYMBaAFMy18STW93imC2lMDsqI i6P0N+1hMA0GCSqGSIb3DQEBBQUAA4GBAH5nNEEP9HeBI7osag8SKRwu4VICQl5W AkHv08/kbVxd8B6ieI9si+DpHMQMl5Uk44Vz164aEAlkJFL3UEt8XJPpnYmrEM5X jdF4+VmQqPcxsSlxRmk60VMpR+cTZURPweKtbTD8WkszaShG263k+4GWuiERxVJu uL1TUTvMbg6B -----END CERTIFICATE----- 求提取证书中密钥文件的命令，网上查了许多无果。