dpt: 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
/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/dpt - from package: pkg-perl-tools

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