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ModemManager --help

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ModemManager --version (return code: 0)


ModemManager 1.4.12
Copyright (2008 - 2014) The ModemManager authors
License GPLv2+: GNU GPL version 2 or later <http://gnu.org/licenses/gpl-2.0.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

ModemManager --help (return code: 0)

Usage:
  ModemManager [OPTION...]

DBus system service to communicate with modems.

Help Options:
  -h, --help                   Show help options
  --help-all                   Show all help options
  --help-test                  Show Test options

Application Options:
  -V, --version                Print version
  --debug                      Run with extended debugging capabilities
  --log-level=INFO             Log level: one of [ERR, WARN, INFO, DEBUG]
  --log-file                   Path to log file
  --timestamps                 Show timestamps in log output
  --relative-timestamps        Use relative timestamps (from MM start)

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