запускать и останавливать программы системных демонов (start and stop system daemon programs)
Статус выхода (Exit)
0 The requested action was performed. If --oknodo was
specified, it's also possible that nothing had to be done.
This can happen when --start was specified and a matching
process was already running, or when --stop was specified
and there were no matching processes.
1 If --oknodo was not specified and nothing was done.
2 If --stop and --retry were specified, but the end of the
schedule was reached and the processes were still running.
3 Any other error.
When using the --status command, the following status codes are
returned:
0 Program is running.
1 Program is not running and the pid file exists.
3 Program is not running.
4 Unable to determine program status.
