MAN page from Old RedHat 7.X clockspeed-0.62-1.i386.rpm
clockspeed
Section: User Commands (1)
Index NAME
clockspeed - speed up or slow down the local clock, continuously
SYNOPSIS
clockspeed DESCRIPTION
clockspeedresets the local UNIX clock every three secondsaccording to(1) an internal hardware tick counter and(2) occasional real-time measurements from a reliable source.
clockspeedreads the real-time measurements from/usr/local/clockspeed/adjust.Each real-time measurement must be a single 16-byte packet,expressed as a TAI64NA time adjustment to the local UNIX clock.
clockspeeddoes not place any limits on the possible adjustments.It is your responsibility to make sure that the measurements are reliable.
After two real-time measurements,clockspeedcan figure out the number of real attoseconds per tick.It saves this number in TAI64NA format in/usr/local/clockspeed/etc/atto,overwriting/usr/local/clockspeed/etc/atto.tmpfor reliability.It reads/usr/local/clockspeed/etc/attowhen it starts up again.
clockspeedmust be run byroot.
SEE ALSO
clockadd(1),
clockview(1),
sntpclock(1),
taiclock(1),
adjtime(2),
gettimeofday(2)
Index
- NAME
- SYNOPSIS
- DESCRIPTION
- SEE ALSO
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