cd-tkdesk: 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/cd-tkdesk - from package: tkdesk

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

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