iseltime: 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/iseltime - from package: ipmiutil

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

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