软件包：ntpstat（0.0.0.1-2） [debports]
show network time protocol (ntp) status
This program uses an NTP mode 6 control message, which is the same as that used by the ntpq command. The ntpdc command uses NTP mode 7, details of which are elusive. For details on the format of NTP control message, see http://www.eecis.udel.edu/~mills/database/rfc/rfc1305/rfc1305b.ps.