outgroup: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On Debian possible default full paths are:

/usr/lib/fastdnaml/bin/outgroup - from package: fastdnaml

You may install the required package with command apt-get install {package}
Error in other languages:
outgroup: bevel nie gevind nie
outgroup: comandă negăsită
outgroup: comando não encontrado
outgroup: commande introuvable
outgroup: command not found
outgroup: käsku ei ole
outgroup: không tìm thấy lệnh
outgroup: komanda nerasta
outgroup: Kommando nicht gefunden.
outgroup: kommandot finns inte
outgroup: komut yok
outgroup: nie znaleziono polecenia
outgroup: níor aimsíodh an t-ordú
outgroup: no se encontró la orden
outgroup: no s'ha trobat l'ordre
outgroup: opdracht niet gevonden
outgroup: parancs nem található
outgroup: perintah tidak ditemukan
outgroup: príkaz nenájdený
outgroup: příkaz nenalezen
outgroup: команда не найдена
outgroup: командата не е открита
outgroup: 命令找不到
outgroup: コマンドが見つかりません