mka2bkvf: 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/mka2bkvf - from package: vftool

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

Error in other languages:
mka2bkvf: bevel nie gevind nie
mka2bkvf: comandă negăsită
mka2bkvf: comando não encontrado
mka2bkvf: commande introuvable
mka2bkvf: command not found
mka2bkvf: käsku ei ole
mka2bkvf: không tìm thấy lệnh
mka2bkvf: komanda nerasta
mka2bkvf: Kommando nicht gefunden.
mka2bkvf: kommandot finns inte
mka2bkvf: komut yok
mka2bkvf: nie znaleziono polecenia
mka2bkvf: níor aimsíodh an t-ordú
mka2bkvf: no se encontró la orden
mka2bkvf: no s'ha trobat l'ordre
mka2bkvf: opdracht niet gevonden
mka2bkvf: parancs nem található
mka2bkvf: perintah tidak ditemukan
mka2bkvf: príkaz nenájdený
mka2bkvf: příkaz nenalezen
mka2bkvf: команда не найдена
mka2bkvf: командата не е открита
mka2bkvf: 命令找不到
mka2bkvf: コマンドが見つかりません