Generate a CSR (Certificate Signing Request) in Linux

1.Issue the following command to generate a CSR and the key that will protect your certificate.

#openssl req -new -newkey rsa:2048 -nodes -keyout example.com.key -out example.com.csr

2. After creating CSR, view the contents of the file using a cat

#cat example.com.csr
#cat example.com.key

 

source: https://www.tecmint.com/generate-csr-certificate-signing-request-in-linux/