multinet: 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/sbin/multinet - from package: dnet-progs

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

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