.TH update "" "" "System Administration"
.PC "Update file systems periodically"
.B /etc/update
.PP
.B update
periodically calls
.B sync
to write to the disk all file system data that are in memory.
It never exits.
.PP
The initialization command file
.B /etc/rc
normally executes
.BR update .
It should not be executed directly.
.SH "See Also"
.Xr "Administering COHERENT," administe
.Xr "init," init
.Xr "sync" sync
