euare-groupcreate: 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/euare-groupcreate - from package: euca2ools

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

On Debian possible default full paths are:

/usr/bin/euare-groupcreate - from package: euca2ools

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

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