euwatch-set-alarm-state: 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-set-alarm-state - from package: euca2ools

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

On Debian possible default full paths are:

/usr/bin/euwatch-set-alarm-state - from package: euca2ools

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

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