LuserNET: 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/LuserNET - from package: lusernet.app

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

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