load_policy: 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:

/sbin/load_policy - from package: policycoreutils
/usr/sbin/load_policy - from package: policycoreutils

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

On Debian possible default full paths are:

/sbin/load_policy - from package: policycoreutils
/usr/sbin/load_policy - from package: policycoreutils

You may install the required package with command apt-get install {package}

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