inet.mpb: 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"

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