ttyload: 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/ttyload - from package: ttyload

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

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