gnupg: General GPGSM Commands
5.1.1 Commands not specific to the function
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'--version'
Print the program version and licensing information. Note that you
cannot abbreviate this command.
'--help, -h'
Print a usage message summarizing the most useful command-line
options. Note that you cannot abbreviate this command.
'--warranty'
Print warranty information. Note that you cannot abbreviate this
command.
'--dump-options'
Print a list of all available options and commands. Note that you
cannot abbreviate this command.