cfdptest: 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/cfdptest - from package: ion

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

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