1993-08-02 21:15:52 +04:00
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.\" -*- nroff -*-
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.\"
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1993-03-21 12:45:37 +03:00
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.\" Copyright (c) 1980, 1991 Regents of the University of California.
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.\" All rights reserved.
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.\"
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1993-08-02 21:15:52 +04:00
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.\" $Id: sync.8,v 1.4 1993/08/02 17:15:52 mycroft Exp $
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1993-03-21 12:45:37 +03:00
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.\"
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.Dd %Q%
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.Dt SYNC 8
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.Os BSD 4
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.Sh NAME
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.Nm sync
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.Nd synchronize internal filesystem information with that on the disk
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.Sh SYNOPSIS
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.Nm sync
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.Sh DESCRIPTION
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.Nm Sync
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can be called to insure that all disk writes have been completed before the
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processor is halted in a way not suitably done by
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.Xr reboot 8
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or
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.Xr halt 8 .
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Generally, it is preferable to use
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.Xr reboot
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or
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.Xr halt
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to shut down the system,
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as they may perform additional actions
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such as resynchronizing the hardware clock
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and flushing internal caches before performing a final
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.Nm sync .
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.Pp
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.Nm Sync
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utilizes the
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.Xr sync 2
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function call.
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.Sh SEE ALSO
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.Xr sync 2 ,
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.Xr fsync 2 ,
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.Xr halt 8 ,
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.Xr reboot 8 ,
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.Xr update 8
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.Sh HISTORY
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A
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.Nm sync
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command appeared in
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.At v6 .
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