autotest: 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/autotest - from package: ruby-zentest

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

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