 clockspeed uses a hardware tick counter to compensate for a persistently fast or slow system clock.
 Given a few time measurements from a reliable source, it computes and then eliminates the clock skew.
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 sntpclock checks another system's NTP clock, and prints the results in a format suitable for input to clockspeed.
 sntpclock is the simplest available NTP/SNTP client.
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 taiclock and taiclockd form an even simpler alternative to SNTP.
 They are suitable for precise time synchronization over a local area network, without the hassles and potential security problems of an NTP server.
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 This version of clockspeed can use the Pentium RDTSC tick counter or the Solaris gethrtime() nanosecond counter or the ARM count register.
