SYNC(8)                   BSD 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
     shutdown(8).  Generally, it is preferable to use shutdown(8) to shut down
     the system, as they may perform additional actions such as resynchroniz-
     ing 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), shutdown(8)

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

BSD                              May 31, 1993                              BSD