BSD 2.11 - man page for sync (bsd section 8)

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

NAME
       sync - update the super block

SYNOPSIS
       sync

DESCRIPTION
       Sync  executes  the  sync  system primitive.  Sync can be called to insure that all disk writes have been com-
       pleted before the processor is halted in a way not suitably done by reboot(8) or halt(8).   Generally,  it  is
       preferable  to  use  reboot  or	halt  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.

       See sync(2) for details on the system primitive.

SEE ALSO
       sync(2), fsync(2), halt(8), reboot(8), update(8)

4th Berkeley Distribution			  November 27, 1996					      SYNC(8)