euwatch-describe-alarm-history: 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/euwatch-describe-alarm-history - from package: euca2ools

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

On Debian possible default full paths are:

/usr/bin/euwatch-describe-alarm-history - from package: euca2ools

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

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