NAME

     sync - flush the cache to disk


SYNOPSIS

     sync


EXAMPLES

     sync                # Write out all modified cache blocks


DESCRIPTION

     MINIX 3 maintains a cache of recently used disk blocks.  The
     sync  command  writes  any modified cache blocks back to the
     disk.  This is essential before  stopping  the  system,  and
     should  be  done before running any a.out program that might
     crash.


SEE ALSO

     sync(2), update(8), shutdown(8).