wbemdc: 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 CentOS possible default full paths are:

/usr/bin/wbemdc - from package: sblim-wbemcli

You may install the required package with command yum install {package}

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