Generate CSR in Linux Server

To create a signed ssl certificate from a trusted certificate authority
you will need to generate a csr, certificate signing request, which will
then be sent to your CA where they can generate the ssl cert for you to
install on the server. This is only necessary for production servers
with a domain or sub domain pointing to it. For non-production use it is
fine to just use a self signed cert that will not cost anything.

yum -y install mod_ssl openssl
cd /etc/pki/tls/certs
openssl genrsa -out new_ssl_cert.key 2048
openssl req -new -key new_ssl_cert.key -out new_ssl_cert.csr