vflbanner: 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/vflbanner - from package: vflib3-bin

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

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