ragraph: 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/bin/ragraph - from package: argus-client

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

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