SYNC(8)                                                                SYNC(8)



NAME
       sync - update the super block

SYNOPSIS
       /etc/sync

DESCRIPTION
       _S_y_n_c  executes the _s_y_n_c system primitive.  _S_y_n_c can be called to insure
       that all disk writes have been completed before the processor is halted
       in  a  way not suitably done by _r_e_b_o_o_t(8) or _h_a_l_t(8).  Generally, it is
       preferable to use _r_e_b_o_o_t or _h_a_l_t 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 _s_y_n_c.

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

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



4th Berkeley Distribution        May 28, 1986                          SYNC(8)