vbutil_keyblock: 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/vbutil_keyblock - from package: vboot-utils

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

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