xfbbd: 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/sbin/xfbbd - from package: fbb

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

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