[GnuTLS][] is the GNU [SSL/TLS][] implementation, because
[OpenSSL][]'s [license is incompatible with the GPL][incompatible].
There are a number of small compatibility issues between the two, so
it's best to use the OpenSSL tools to create certs and keys for use by
OpenSSL-linked servers and the GnuTLS tools to create certs and keys
for use by GnuTLS-linked servers.  See [[X.509_certificates]] for
details on creating self-signed keys with both packages.

[GnuTLS]: http://www.gnu.org/software/gnutls/
[SSL/TLS]: http://en.wikipedia.org/wiki/Transport_Layer_Security
[OpenSSL]: http://www.openssl.org/
[incompatible]: http://en.wikipedia.org/wiki/OpenSSL#Licensing

[[!tag tags/linux]]
[[!tag tags/tools]]