rgxg: 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/rgxg - from package: rgxg

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

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