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PCFDATE(8)             DragonFly System Manager's Manual            PCFDATE(8)

NAME

pcfdate - get the time from a radio clock and set the system time

SYNOPSIS

pcfdate [-qsuv] [device ...]

DESCRIPTION

Get and display the date and time from a pcfclock(4) device and optionally set the system time. If no device is specified on the command line pcfdate tries to read the time from /dev/pcfclocks/[0-2] and /dev/pcfclock[0-2]. pcfdate is usually executed at boot time to set the system time. Never run pcfdate via cron(8) to set the system time. pcfdate causes a sudden jump forwards or backwards, which can cause a variety of problems in a system. Always use the Network Time Protocol (NTP) <http://www.ntp.org/> to gradually adjust the time. A minimal /etc/ntp.conf that uses the radio clock as its reference time source typically contains the following configuration commands: driftfile /etc/ntp.drift server 127.127.35.0 fudge 127.127.35.0 flag2 1

OPTIONS

-q Do not output the time. -s Set the system time. -u Output Coordinated Universal Time instead of local time. -v Output status information.

FILES

/dev/pcfclocks/* /dev/pcfclock*

DIAGNOSTICS

Operation not permitted Only a privileged user may set the system time. Resource temporarily unavailable Another process is accessing the radio clock.

AUTHOR

Andreas Voegele

SEE ALSO

pcfclock(4), settimeofday(2). March 31, 2004 PCFDATE(8)

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