ragator: 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/ragator - from package: argus-client

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