hmm_train(1) on Linux
The text 08d22a4eb337, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster) shipped it. The page shows this text now.
Estimate the transition probabilities of an HMM, based on multiple -g <gff_fname_list> [OPTIONS] > out.hmm