vflmkfdb: 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/vflmkfdb - from package: vflib3-bin

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

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