dntype: 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/bin/dntype - from package: dnet-progs

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

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