cdloop: command not found

Have You tried accessing the binary with the full path?

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/cdloop - from package: cdtool

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