wmb: 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/wmb - from package: wml

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

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