NAME
sync —
force completion of pending disk writes
(flush cache)
SYNOPSIS
sync |
DESCRIPTION
Thesync program 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 program simply invokes the
sync(2) system call.
SEE ALSO
HISTORY
A sync command appeared in
Version 4 AT&T UNIX.