$openssl genrsa -out server.key 1024

Generating RSA private key, 1024 bit long modulus
..........................++++++
..................................................................................++++++
e is 65537 (0x10001)

$openssl req -new -key server.key -out server.csr

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]:
State or Province Name (full name) [Some-State]:
Locality Name (eg, city) []:
Organization Name (eg, company) [Internet Widgits Pty Ltd]:
Organizational Unit Name (eg, section) []:
Common Name (eg, YOUR name) []:
Email Address []:

Please enter the following 'extra' attributes
to be sent with your certificate request
A challenge password []:
An optional company name []:

$openssl x509 -req -days 366 -in server.csr -signkey server.key 
-out server.crt

$ls

server.crt
server.csr
server.key
server.pem

Now add the below lines into your apache conf and ensure ssl is enabled

 
SSLCertificateFile /path/to/ssl/server.crt 
SSLCertificateKeyFile /path/to/ssl/server.key