euscale-describe-policies: 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-describe-policies - from package: euca2ools

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

On Debian possible default full paths are:

/usr/bin/euscale-describe-policies - from package: euca2ools

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

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