sync(1M)                                                           sync(1M)

NAME
     sync - flush system buffers

SYNOPSIS
     sync

DESCRIPTION
     sync causes all system buffers not yet written to hard disk or flop-
     pies to be flushed out to disk, thus assuring that all file updates up
     to that point are saved.

     A system buffer is an internal buffer that serves to improve system
     performance. It is not accessible to users.

   Application usage

     If the system is to be shut down, sync should be called beforehand to
     ensure file system integrity. The system administrator commands
     /etc/shutdown and /etc/halt call sync automatically.

     sync will only write local buffers to local disks; you cannot use sync
     to force buffers to be written out to disk on remote machines.

SEE ALSO
     ssync(1M), sync(2).






























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