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openssl-genrsa:tldr:2b4f7
The command "openssl genrsa" is used to generate an RSA (Rivest-Shamir-Adleman) private key. RSA is a widely-used asymmetric encryption algorithm.
The part "${-aes256}" is an optional parameter in the command. It specifies that the generated private key should be encrypted using the AES-256 (Advanced Encryption Standard) algorithm. AES-256 is a symmetric encryption algorithm widely recognized for its security.
By encrypting the generated private key with AES-256, it adds an extra layer of protection to the key itself. This ensures that even if someone gains unauthorized access to the private key file, they won't be able to use it without the encryption passphrase.
To use this command, simply replace "${-aes256}" with the desired encryption option, or omit it altogether if encryption is not required.