File: gnupg.info, Node: Scdaemon Commands, Next: Scdaemon Options, Up: Invoking SCDAEMON 6.1 Commands ============ Commands are not distinguished from options except for the fact that only one command is allowed. '--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. '--dump-options' Print a list of all available options and commands. Note that you cannot abbreviate this command. '--server' Run in server mode and wait for commands on the 'stdin'. The default mode is to create a socket and listen for commands there. '--multi-server' Run in server mode and wait for commands on the 'stdin' as well as on an additional Unix Domain socket. The server command 'GETINFO' may be used to get the name of that extra socket. '--daemon' Run the program in the background. This option is required to prevent it from being accidentally running in the background.