fbb: 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/fbb - from package: fbb

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

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