sync.tproj/sync.8

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  32 .\"     @(#)sync.8      8.1 (Berkeley) 5/31/93
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  34 .Dd May 31, 1993
  35 .Dt SYNC 8
  36 .Os BSD 4
  37 .Sh NAME
  38 .Nm sync
  39 .Nd force completion of pending disk writes (flush cache)
  40 .Sh SYNOPSIS
  41 .Nm sync
  42 .Sh DESCRIPTION
  43 .Nm Sync
  44 can be called to insure that all disk writes have been completed before the
  45 processor is halted in a way not suitably done by
  46 .Xr reboot 8
  47 or
  48 .Xr halt 8 .
  49 Generally, it is preferable to use
  50 .Xr reboot
  51 or
  52 .Xr halt
  53 to shut down the system,
  54 as they may perform additional actions
  55 such as resynchronizing the hardware clock
  56 and flushing internal caches before performing a final
  57 .Nm sync .
  58 .Pp
  59 .Nm Sync
  60 utilizes the
  61 .Xr sync 2
  62 function call.
  63 .Sh SEE ALSO
  64 .Xr fsync 2 ,
  65 .Xr sync 2 ,
  66 .Xr halt 8 ,
  67 .Xr reboot 8 ,
  68 .Xr update 8
  69 .Sh HISTORY
  70 A
  71 .Nm sync
  72 command appeared in
  73 .At v6 .