avr-evtd: command not found

Have You tried accessing the binary with the full path?

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/avr-evtd - from package: avr-evtd

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