cdbyank: 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/cdbyank - from package: cdbfasta

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

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