load_kernel_test: 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/load_kernel_test - from package: vboot-utils

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

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