-vmodule[:facility[:level]], --verbose=module[:facility[:level]]
    Sets the logging level for module in facility to level:

    •   module may be any valid module name (as displayed by the --list action on vlogconf(8)), or the special name ANY to set the logging levels for all modules.

    •   facility may be syslog, console, or file to set the levels for logging to the system log, the console, or a file respectively, or ANY to set the logging levels for both facilities. If it is omitted, facility defaults to ANY. Regardless of the log levels set for file, logging to a file will not take place unless --log-file is also specified (see below).

    •   level must be one of emer, err, warn, info, or dbg, designating the minimum severity of a message for it to be logged. If it is omitted, level defaults to dbg.

-v, --verbose
    Sets the maximum logging verbosity level, equivalent to --verbose=ANY:ANY:dbg.

-vPATTERN:facility:pattern, --verbose=PATTERN:facility:pattern
    Sets the log pattern for facility to pattern. Refer to vlogconf(8) for a description of the valid syntax for pattern.

--log-file[=file]
    Enables logging to a file. If file is specified, then it is used as the exact name for the log file. The default log file name used if file is omitted is @LOGDIR@/.log.