What can I use OpenSSL "pkeyparam" command for? What are options supported by the "pkeyparam" command?

OpenSSL "pkeyparam" command is a utility to view and manage key generation parameter files.

Note that "pkeyparam" command is replacing the "dsaparam" command.

Here are options supported by the "pkeyparam" command:

-in filename
    This specifies the input filename to read parameters from or standard 
    input if this option is not specified.

-out filename
    This specifies the output filename to write parameters to or standard 
    output if this option is not specified.

-text
    prints out the parameters in plain text in addition to the encoded version.

-noout
    do not output the encoded version of the parameters.

-engine id
    specifying an engine (by its unique id string) will cause pkeyparam to 
    attempt to obtain a functional reference to the specified engine, thus 
    initialising it if needed. The engine will then be set as the default 
    for all available algorithms. 

⇒OpenSSL "genpkey" Command for DSA Keys

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