SYNC

Section: Maintenance Commands (8)
Index Return to Main Contents

BSD mandoc
BSD 4

NAME

sync - synchronize internal filesystem information with that on the disk

SYNOPSIS

sync

DESCRIPTION

Sync can be called to insure 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 or halt 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

Sync utilizes the sync(2) function call.

HISTORY

A sync command appeared in AT&T System v6 .