gnome-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/gnome-music - from package: gnome-music

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

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