audio-entropyd: 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/sbin/audio-entropyd - from package: audio-entropyd

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

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