mbt: 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/mbt - from package: mbt

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

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