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Generate CSR (Certificate Signing Request)

openssl req -new -newkey rsa:2048 -nodes -keyout medjava.ro.key -out medjava.ro.csr

Send mail with attachments

mail -s "CSR Files" -a phab.ro.csr -a nocloud.ro.csr odefta@medjava.ro < message.txt

- CSR Files is the subject - message.txt contains the body message - phab.ro.csr and nocloud.ro.csr are the attachments