Document sadf's new option -[0-9]+.
Signed-off-by: Sebastien GODARD <sysstat@users.noreply.github.com>
-.TH SADF 1 "JUNE 2014" Linux "Linux User's Manual" -*- nroff -*-
+.TH SADF 1 "JULY 2014" Linux "Linux User's Manual" -*- nroff -*-
.SH NAME
sadf \- Display data collected by sar in multiple formats.
.SH SYNOPSIS
.I count
.B ] ] [
.I datafile
+|
+.I -[0-9]+
.B ]
.SH DESCRIPTION
The
is omitted,
.B sadf
uses the standard system activity daily data file.
+It is also possible to enter -1, -2 etc. as an argument to
+.B sadf
+to display data of that days ago.
+For example, -1 will point at the standard system
+activity file of yesterday.
The standard system activity daily data file is named
.I saDD