rhev-check.sh: 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/rhev-check.sh - from package: resource-agents

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

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