cdck: 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/cdck - from package: cdck

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

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