euform-update-stack: 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/euform-update-stack - from package: euca2ools

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

On Debian possible default full paths are:

/usr/bin/euform-update-stack - from package: euca2ools

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

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