How can i create a CSR (Certificate signing Request ) file in a Linux Ubuntu 13? -

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I am trying to create a CSR file in an Ubuntu 13. How can I do this from the command line? I know how to do this with the Mac OS in the keys, but in fact I do not have one.

I try this in the Mac OS:

Keychain Access drop down menu, Keychain Access> Certification Assistant> Request a certificate from a certificate authority.

In the certificate information window, enter the following information: In the user email address field, enter your email address in the Common Name field, create a name for your private key (e.g., John doe dev key) . The CA email address field must be left blank. In the "Request" group, select the "Saved disc" option. To complete the CSR Generation process click Continue during the key mill reach.

You have the command openssl req , here are the instructions:

This is a bit of a process, but it will boil down for something: 

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

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