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=head1 NAME
rrdfirst - Return the date of the first data sample in an RRA within an RRD
=head1 SYNOPSIS
B<rrdtool> B<first> I<filename> [B<--rraindex> I<number>] [B<--daemon>|B<-d> I<address>]
=head1 DESCRIPTION
The B<first> function returns the UNIX timestamp of the first data
sample entered into the specified RRA of the RRD file.
=over 8
=item I<filename>
The name of the B<RRD> that contains the data.
=item B<--rraindex> I<number>
The index number of the B<RRA> that is to be examined. If not specified, the
index defaults to zero. B<RRA> index numbers can be determined through
B<rrdtool info>.
=item B<--daemon>|B<-d> I<address>
Address of the L<rrdcached> daemon. For a list of accepted formats, see
the B<-l> option in the L<rrdcached> manual.
rrdtool first --daemon unix:/var/run/rrdcached.sock /var/lib/rrd/foo.rrd
=back
=head1 AUTHOR
Burton Strauss <Burton@ntopSupport.com>
Daemon support added by Steve Shipway <steve@steveshipway.org>
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