question about certificate for domain

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Unix Certificate

TO WHOM IT MAY CONCERN: I am Ayanda Fuzile, I would like to request my UNIX Certificate, I completed my course in 2000. My email adress is removed, my postal adress is also removed. Kind Regards, Ayanda Fuzile

LEARN ABOUT OSX

x509

x509(3) 							      OpenSSL								   x509(3)

NAME

       x509 - X.509 certificate handling

SYNOPSIS

	#include <openssl/x509.h>

DESCRIPTION

       A X.509 certificate is a structured grouping of information about an individual, a device, or anything one can imagine.	A X.509 CRL
       (certificate revocation list) is a tool to help determine if a certificate is still valid.  The exact definition of those can be found in
       the X.509 document from ITU-T, or in RFC3280 from PKIX.	In OpenSSL, the type X509 is used to express such a certificate, and the type
       X509_CRL is used to express a CRL.

       A related structure is a certificate request, defined in PKCS#10 from RSA Security, Inc, also reflected in RFC2896.  In OpenSSL, the type
       X509_REQ is used to express such a certificate request.

       To handle some complex parts of a certificate, there are the types X509_NAME (to express a certificate name), X509_ATTRIBUTE (to express a
       certificate attributes), X509_EXTENSION (to express a certificate extension) and a few more.

       Finally, there's the supertype X509_INFO, which can contain a CRL, a certificate and a corresponding private key.

       X509_..., d2i_X509_... and i2d_X509_... handle X.509 certificates, with some exceptions, shown below.

       X509_CRL_..., d2i_X509_CRL_... and i2d_X509_CRL_...  handle X.509 CRLs.

       X509_REQ_..., d2i_X509_REQ_... and i2d_X509_REQ_...  handle PKCS#10 certificate requests.

       X509_NAME_... handle certificate names.

       X509_ATTRIBUTE_... handle certificate attributes.

       X509_EXTENSION_... handle certificate extensions.

SEE ALSO

       X509_NAME_ENTRY_get_object(3), X509_NAME_add_entry_by_txt(3), X509_NAME_add_entry_by_NID(3), X509_NAME_print_ex(3), X509_NAME_new(3),
       d2i_X509(3), d2i_X509_ALGOR(3), d2i_X509_CRL(3), d2i_X509_NAME(3), d2i_X509_REQ(3), d2i_X509_SIG(3), crypto(3), x509v3(3)

50								    2013-03-05								   x509(3)

Cybersecurity