metasys: 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:

/sbin/metasys - from package: nut

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

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