isensor: 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/isensor - from package: ipmiutil

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

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