ievents: 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/ievents - from package: ipmiutil

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

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