mbw: 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/mbw - from package: mbw

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

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