http://www.trilug.org/~jonc/mailserver/Intro.html

openssl genrsa -des3 -out carolinacustom.key 1024
openssl req -new -key carolinacustom.key -out carolinacustom.csr
openssl req -noout -text -in carolinacustom.csr
openssl rsa -noout -text -in carolinacustom.key

    Data:
        Version: 0 (0x0)
        Subject: C=US, ST=North Carolina, L=Clinton, O=Carolina Custom, OU=Product Development, 
        CN=www.carolinacustom.com/emailAddress=root@carolinacustom.com
        Subject Public Key Info:
            Public Key Algorithm: rsaEncryption
            RSA Public Key: (1024 bit)
                Modulus (1024 bit):