evtest: 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/evtest - from package: evtest

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

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