ear_candy: 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/ear_candy - from package: earcandy

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

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