cdcd: 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/cdcd - from package: cdcd

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

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