dnamlk: 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/dnamlk - from package: phylip

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

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