> systemd [OPTION…]

Start and monitor system and user services.

Options:
  -h --help                      Show this help
     --version                   Show package version
     --test                      Determine initial transaction, dump it and exit
     --system                    Combined with --test: operate in system mode
     --user                      Combined with --test: operate in user mode
     --dump-configuration-items  Dump understood unit configuration items
     --dump-bus-properties       Dump exposed bus properties
     --bus-introspect=PATH       Write XML introspection data
     --unit=UNIT                 Set default unit
     --dump-core[=BOOL]          Dump core on crash
     --crash-chvt=NR             Change to specified VT on crash
     --crash-action=ACTION       Specify what to do on crash
     --crash-shell[=BOOL]        Run shell on crash
     --confirm-spawn[=BOOL]      Ask for confirmation when spawning processes
     --show-status[=BOOL]        Show status updates on the console during boot
     --log-target=TARGET         Set log target (console, journal, kmsg, journal-or-kmsg, null)
     --log-level=LEVEL           Set log level (debug, info, notice, warning, err, crit, alert,
                                 emerg)
     --log-color[=BOOL]          Highlight important log messages
     --log-location[=BOOL]       Include code location in log messages
     --log-time[=BOOL]           Prefix log messages with current time
     --default-standard-output=… Set default standard output for services
     --default-standard-error=…  Set default standard error output for services
     --no-pager                  Do not start a pager

See the systemd(1) man page for details.