ireset: 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/sbin/ireset - from package: ipmiutil

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

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