How to use .cer files in Centos

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http://stackoverflow.com – I'm new in linux. Recently we were asked to enable SSL for one of our projects in the sandbox, and I did using with the following command: yum install mod_ssl openssl openssl genrsa -out ca.key 2048 openssl req -new -key ca.key -out ca.csr openssl x509 -req -days 365 -in ca.csr -signkey ca.key -out ca.crt cp ca.crt /etc/pki/tls/certs cp ca.key /etc/pki/tls/private/ca.key cp ca.csr /etc/pki/tls/private/ca.csr When we need to deploy the product, we need a valid/trusted certificate so one of our guys bought the certificate using my actual CSR file. What I got from him is a .CER file, i thou (HowTos)