dwbem: 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/dwbem - from package: dwb

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

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