dt: 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/dt - from package: ditrack

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

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