mka2bkjvf: 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/mka2bkjvf - from package: vftool

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

Error in other languages:
mka2bkjvf: bevel nie gevind nie
mka2bkjvf: comandă negăsită
mka2bkjvf: comando não encontrado
mka2bkjvf: commande introuvable
mka2bkjvf: command not found
mka2bkjvf: käsku ei ole
mka2bkjvf: không tìm thấy lệnh
mka2bkjvf: komanda nerasta
mka2bkjvf: Kommando nicht gefunden.
mka2bkjvf: kommandot finns inte
mka2bkjvf: komut yok
mka2bkjvf: nie znaleziono polecenia
mka2bkjvf: níor aimsíodh an t-ordú
mka2bkjvf: no se encontró la orden
mka2bkjvf: no s'ha trobat l'ordre
mka2bkjvf: opdracht niet gevonden
mka2bkjvf: parancs nem található
mka2bkjvf: perintah tidak ditemukan
mka2bkjvf: príkaz nenájdený
mka2bkjvf: příkaz nenalezen
mka2bkjvf: команда не найдена
mka2bkjvf: командата не е открита
mka2bkjvf: 命令找不到
mka2bkjvf: コマンドが見つかりません