ramon: 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/ramon - from package: argus-client

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