blazer_ser: 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/blazer_ser - from package: nut

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

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