madplay: 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/madplay - from package: madplay

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

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