ntpsec-ntpdig - 1.2.3+dfsg1-3+b1 main

NTP, the Network Time Protocol, is used to keep computer clocks
accurate by synchronizing them over the Internet or a local network,
or by following an accurate hardware receiver that interprets GPS,
DCF-77, or similar time signals.
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ntpdig can be used as an SNTP client to query a NTP or SNTP server
and either display the time or set the local system's time. It is not
sufficient, however, for maintaining an accurate clock in the long run.
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This is the NTPsec version of ntpdig, which is equivalent to the sntp
utility. NTPsec is a secure, hardened, and improved implementation
derived from the original NTP project.