mb2org: 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/mb2org - from package: fcitx-tools

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

Error in other languages:
mb2org: bevel nie gevind nie
mb2org: comandă negăsită
mb2org: comando não encontrado
mb2org: commande introuvable
mb2org: command not found
mb2org: käsku ei ole
mb2org: không tìm thấy lệnh
mb2org: komanda nerasta
mb2org: Kommando nicht gefunden.
mb2org: kommandot finns inte
mb2org: komut yok
mb2org: nie znaleziono polecenia
mb2org: níor aimsíodh an t-ordú
mb2org: no se encontró la orden
mb2org: no s'ha trobat l'ordre
mb2org: opdracht niet gevonden
mb2org: parancs nem található
mb2org: perintah tidak ditemukan
mb2org: príkaz nenájdený
mb2org: příkaz nenalezen
mb2org: команда не найдена
mb2org: командата не е открита
mb2org: 命令找不到
mb2org: コマンドが見つかりません