root2flat(1) on Linux
The text bc3d780d7f99, as Debian 8 (Jessie), Debian 7 (Wheezy) shipped it. The page shows this text now.
Read in .root files and write out the histograms in FLAT format
Flags it lists
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--help -
-a -
-e -
-f -
-h -
-o -
-x