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SYNC(8)			FreeBSD	System Manager's Manual		       SYNC(8)

NAME
     sync -- force completion of pending disk writes (flush cache)

SYNOPSIS
     sync

DESCRIPTION
     The sync utility can be called to ensure that all disk writes have	been
     completed before the processor is halted in a way not suitably done by
     reboot(8) or halt(8).  Generally, it is preferable	to use reboot(8) or
     halt(8) to	shut down the system, as they may perform additional actions
     such as resynchronizing the hardware clock	and flushing internal caches
     before performing a final sync.

     The sync utility utilizes the sync(2) function call.

SEE ALSO
     fsync(2), sync(2),	syncer(4), halt(8), reboot(8)

HISTORY
     A sync utility appeared in	Version	4 AT&T UNIX.

FreeBSD	10.1			 May 31, 1993			  FreeBSD 10.1

NAME | SYNOPSIS | DESCRIPTION | SEE ALSO | HISTORY

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