mgpnet: 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/mgpnet - from package: mgp

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

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