SYNC(8)                 386BSD System Manager's Manual                 SYNC(8)

NAME
     sync - synchronize internal filesystem information with that on the disk

SYNOPSIS
     sync

DESCRIPTION
     Sync can be called to insure 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 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.

     Sync utilizes the sync(2) function call.

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

HISTORY
     A sync command appeared in Version 6 AT&T UNIX.

4th Berkeley Distribution      October 20, 1994                              1