.TH UPDATE 8
.SH NAME
update \- periodically write the buffer cache to disk
.SH SYNOPSIS
\fBupdate\fR
.br
.de FL
.TP
\\fB\\$1\\fR
\\$2
..
.de EX
.TP 20
\\fB\\$1\\fR
# \\$2
..
.SH EXAMPLES
.EX "update &" "Start a process that flushes the cache"
.SH DESCRIPTION
.PP
When the system is booted,
.I update
is started up in the background from 
.I /etc/rc
to issue a 
\&SYNC
system call every 30 sec.
.SH "SEE ALSO"
.BR boot (8).