cdfprobe: 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/cdfprobe - from package: cdftools

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

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