rrdfirst(1) on Linux
The text 49b81a6337d2, as Debian 7 (Wheezy) shipped it.
Return the date of the first data sample in an RRA within an RRD
Flags it lists
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--rraindex
The text 49b81a6337d2, as Debian 7 (Wheezy) shipped it.
Return the date of the first data sample in an RRA within an RRD
--rraindex