ffc: 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/ffc - from package: python-ffc

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

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