vflmkgf: 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/vflmkgf - from package: vflib3-bin

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

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