What command is used to get help on the usage of smbclient?

The command to obtain help on the usage of smbclient is correctly identified as entering "smbclient --help." This option utilizes the common convention in Linux and UNIX-like systems, where the "--help" flag is typically employed to display help information regarding a command's usage, options, and available features.

Using this flag, smbclient will provide a detailed description of how to use the command effectively, along with examples of the various options that can be used with it. This practice adheres to the standards set forth by many command-line utilities, where the double dash followed by 'help' signals to the command to output its help documentation.

The other options do not conform to the standard usage for obtaining help on smbclient or may not provide the expected output. For instance, while the "-h" option is a commonly accepted shorthand in many commands, it might not be recognized by smbclient specifically as a help command. The "help" argument often does not invoke the help documentation for command-line utilities in this context, and the "-?" syntax, while common in some commands to request help, is not standardized across all utilities.