The NTP package contains NTP protocol client and server. ntpd: NTP daemon that runs in the background and keeps the date/time synchronized based on response from configured NTP servers. It also functions as a NTP server. ntpdate: NTP Client program that sets the date/time based on the response from an NTP Server. This command is deprecated. ntp-genkeys: This program generates cryptographic data files used by the NTPv4 authentication and identification schemes. a ARPANET file transfer client. ntpdc and ntpq: Programs to query and set ntpd configuration. ntptrace: Trace a chain of NTP servers back to the primary source.