milkytracker: 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/milkytracker - from package: milkytracker

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

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