euimage-pack-image: 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/euimage-pack-image - from package: euca2ools

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

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