action_snmptrap: 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/share/torrus/bin/action_snmptrap - from package: torrus-common

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

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