V8/usr/man/man8/sync.8

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.TH SYNC 8 
.SH NAME
sync \- update the super block
.SH SYNOPSIS
.B sync
.SH DESCRIPTION
.I Sync
executes the
.I sync
system primitive.
.I Sync
can be called to insure all disk writes have been completed before the
processor is halted manually.
.SH "SEE ALSO"
sync(2), reboot(8), update(8)