How To Create a SSL Certificate on Apache for CentOS 6

Step One—Install Mod SSL

yum install mod_ssl

Step Two—Create a New Directory

mkdir /etc/httpd/ssl 

Step Three—Create a Self Signed Certificate

openssl req -x509 -nodes -days 365 -newkey rsa:2048 -keyout /etc/httpd/ssl/apache.key -out /etc/httpd/ssl/apache.crt

You are about to be asked to enter information that will be incorporated
into your certificate request.
What you are about to enter is what is called a Distinguished Name or a DN.
There are quite a few fields but you can leave some blank
For some fields there will be a default value,
If you enter '.', the field will be left blank.
-----
Country Name (2 letter code) [AU]:US
State or Province Name (full name) [Some-State]:New York
Locality Name (eg, city) []:NYC
Organization Name (eg, company) [Internet Widgits Pty Ltd]:Awesome Inc
Organizational Unit Name (eg, section) []:Dept of Merriment
Common Name (e.g. server FQDN or YOUR name) []:example.com                  
Email Address []:[email protected]

Step Four—Set Up the Certificate

 vi /etc/httpd/conf.d/ssl.conf

 ServerName example.com:443

SSLEngine on
SSLCertificateFile /etc/httpd/ssl/apache.crt
SSLCertificateKeyFile /etc/httpd/ssl/apache.key 

Step Five—Restart Apache

 /etc/init.d/httpd restart