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| SYNC(8) | FreeBSD System Manager's Manual | SYNC(8) |
NAME
sync —
force completion of pending disk writes (flush cache)
SYNOPSIS
sync |
DESCRIPTION
Thesync 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
reboot(8)
or halt(8).
Generally, it is preferable to use
reboot(8)
or halt(8)
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.
The sync utility utilizes the
sync(2)
function call.
SEE ALSO
fsync(2), sync(2), syncer(4), halt(8), reboot(8)HISTORY
Async utility appeared in
Version 4 AT&T UNIX.
| May 31, 1993 | FreeBSD 13.1-RELEASE |
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