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-.\" Copyright (c) 1991, 1993
-.\" The Regents of the University of California. All rights reserved.
-.\"
-.\" Redistribution and use in source and binary forms, with or without
-.\" modification, are permitted provided that the following conditions
-.\" are met:
-.\" 1. Redistributions of source code must retain the above copyright
-.\" notice, this list of conditions and the following disclaimer.
-.\" 2. Redistributions in binary form must reproduce the above copyright
-.\" notice, this list of conditions and the following disclaimer in the
-.\" documentation and/or other materials provided with the distribution.
-.\" 3. All advertising materials mentioning features or use of this software
-.\" must display the following acknowledgement:
-.\" This product includes software developed by the University of
-.\" California, Berkeley and its contributors.
-.\" 4. Neither the name of the University nor the names of its contributors
-.\" may be used to endorse or promote products derived from this software
-.\" without specific prior written permission.
-.\"
-.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
-.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
-.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
-.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
-.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
-.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
-.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
-.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
-.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
-.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
-.\" SUCH DAMAGE.
-.\"
-.\" @(#)update.8 8.3 (Berkeley) 4/19/94
-.\"
-.Dd April 19, 1994
-.Dt UPDATE 8
-.Os
-.Sh NAME
-.Nm update
-.Nd flush internal filesystem caches to disk frequently
-.Sh SYNOPSIS
-.Nm update
-.Sh DESCRIPTION
-The
-.Nm update
-command helps protect the integrity of disk volumes
-by flushing
-volatile cached filesystem data
-to disk at thirty second intervals.
-.Nm Update
-uses the
-.Xr sync 2
-function call to do the task.
-.Pp
-.Nm Update
-is commonly invoked at startup time by
-.Xr rc 8
-when the system goes multi-user.
-.Sh SEE ALSO
-.Xr sync 2 ,
-.Xr fsck 8 ,
-.Xr init 8 ,
-.Xr rc 8 ,
-.Xr sync 8
-.Sh BUGS
-It is possible on some systems that a
-.Xr sync
-occurring simultaneously with a crash may cause
-file system damage. See
-.Xr fsck 8 .
-.Sh HISTORY
-An
-.Nm update
-command appeared in
-.At v6 .
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