wdm: 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/wdm - from package: wdm

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

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