cdvolume: 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/cdvolume - from package: cdtool

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

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