music: 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/music - from package: music-bin

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

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