dnadist: command not found

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

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

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/phylip/bin/dnadist - from package: phylip

You may install the required package with command apt-get install {package}

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