wmcpu: 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/wmcpu - from package: wmcpu

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

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