avrp: 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/bin/avrp - from package: avrp

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