oldmge-shut: 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/oldmge-shut - from package: nut

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

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