bootptest: 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/sbin/bootptest - from package: bootp

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

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