euscale-execute-policy: 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/euscale-execute-policy - from package: euca2ools

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

On Debian possible default full paths are:

/usr/bin/euscale-execute-policy - from package: euca2ools

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

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