NAME
sync —
force completion of pending disk writes
(flush cache)
SYNOPSIS
sync |
DESCRIPTION
The sync 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
HISTORY
A sync utility appeared in
Version 4 AT&T UNIX.