openssl-req:tldr:9c946

openssl-req: Generate a certificate signing request to be sent to a certificate authority.

openssl

$ openssl req -new -sha256 -key ${filename-key} -out ${filename-csr}

try on your machine

The command you provided is used with the OpenSSL library to generate a new Certificate Signing Request (CSR) using a private key.

Let's break down the command:

openssl: This is the command-line tool used to interface with the OpenSSL library, which provides functions for SSL/TLS and encryption.
req: This is a subcommand of OpenSSL used to handle Certificate Signing Request (CSR) operations.
-new: This option instructs OpenSSL to generate a new CSR.
-sha256: This option specifies the hashing algorithm to be used. In this case, SHA-256 is chosen as the algorithm for generating the CSR signature.
-key ${filename-key}: This option specifies the location and filename of the private key to be used for generating the CSR. The ${filename-key} is a placeholder that needs to be replaced with the actual filename and path of the key file.
-out ${filename-csr}: This option specifies the location and filename for the output CSR file generated by OpenSSL. The ${filename-csr} is a placeholder that needs to be replaced with the desired filename and path for the CSR file.

By running this command with the appropriate values for ${filename-key} and ${filename-csr}, you will generate a new CSR using the provided private key and save it in the specified output file.

This explanation was created by an AI. In most cases those are correct. But please always be careful and never run a command you are not sure if it is safe.

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